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Environmental Chemistry: Current Research Articles


 
Current Articles in the field of Environmental Chemistry published online in scientific journals.

The author- or copyrights of the listed research articles below are held by the respective authors or site operators, who are also responsible for the content of the presentations.

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On this page considered biochemistry journals:


Environmental Chemistry - published by CSIRO -
... is a multidisciplinary journal addressing chemical processes of the environment.

Environmental Science & Technology - published by The American Chemical Society -
Published twice monthly, ES&T is a unique source of information for scientific and technical professionals in a wide range of environmental disciplines

Journal of Environmental Monitoring - published by The Royal Society of Chemistry -
... focuses on Environmental Processes and Impacts.

Environmental Chemistry Letters - published by Springer -
... is located at the interfaces of geology, chemistry, physics and biology.



Current research articles of the mentioned journals:


A Fresh Look at Road Salt: Aquatic Toxicity and Water-Quality Impacts on Local, Regional, and National Scales

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 1 Sep 2010 | 8:00 am CEST

Ecosystem-Based Assessment Indices of Restoration for Daya Bay near a Nuclear Power Plant in South China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 31 Aug 2010 | 9:51 pm CEST

Comparative Assessment of Life Cycle Assessment Methods Used for Personal Computers

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 31 Aug 2010 | 7:24 pm CEST

Abnormally High Ammonium of Natural Origin in a Coastal Aquifer-Aquitard System in the Pearl River Delta, China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 31 Aug 2010 | 7:23 pm CEST

Biodegradability of Lingering Crude Oil 19 Years after the Exxon Valdez Oil Spill

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 31 Aug 2010 | 4:32 pm CEST

Evaluating the Fate of Metals in Air Pollution Control Residues from Coal-Fired Power Plants

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 31 Aug 2010 | 3:45 pm CEST

Nitrous Oxide Emissions from a Large, Impounded River: The Ohio River

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 8:06 pm CEST

Dissolution Study of Metatorbernite: Thermodynamic Properties and the Effect of pH and Phosphate

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 8:06 pm CEST

Effects of Diazepam on Gene Expression and Link to Physiological Effects in Different Life Stages in Zebrafish Danio rerio

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 8:02 pm CEST

Further Purification of Industrial Quartz by Much Milder Conditions and a Harmless Method

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 3:35 pm CEST

Throwing Fuel on the Fire: Synergistic Effects of Excessive Nitrogen Inputs and Global Warming on Harmful Algal Blooms

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 3:24 pm CEST

Pore-Scale Study of Transverse Mixing Induced CaCO3 Precipitation and Permeability Reduction in a Model Subsurface Sedimentary System

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 3:24 pm CEST

Household Water Treatment and the Millennium Development Goals: Keeping the Focus on Health

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 3:23 pm CEST

Effect of Bare and Coated Nanoscale Zerovalent Iron on tceA and vcrA Gene Expression in Dehalococcoides spp

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 3:22 pm CEST

Pseudo-Emulsion Membrane Strip Dispersion (PEMSD) Pertraction of Chromium(VI) Using CYPHOS IL101 Ionic Liquid as Carrier

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 3:21 pm CEST

Occurrence of Alkyltrimethylammonium Compounds in Urban Estuarine Sediments: Behentrimonium As a New Emerging Contaminant

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 2:25 pm CEST

Quaternary Ammonium Compounds in Urban Estuarine Sediment Environments - A Class of Contaminants in Need of Increased Attention?

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 2:25 pm CEST

Coastal Loading and Transport of Escherichia coli at an Embayed Beach in Lake Michigan

Environmental Science & Technology, Volume 44, Issue 17, Page 6731-6737, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:08 am CEST

Occurrence of Xenobiotics in Gray Water and Removal in Three Biological Treatment Systems

Environmental Science & Technology, Volume 44, Issue 17, Page 6835-6842, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:07 am CEST

An Asia-Specific Source of Dechlorane Plus: Concentration, Isomer Profiles, and Other Related Compounds

Environmental Science & Technology, Volume 44, Issue 17, Page 6608-6613, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:07 am CEST

Active Iron-Rich Belite Sulfoaluminate Cements: Clinkering and Hydration

Environmental Science & Technology, Volume 44, Issue 17, Page 6855-6862, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:06 am CEST

Kinetic Reaction Modeling Framework for Identifying and Quantifying Reductant Reactivity in Heterogeneous Aquifer Sediments

Environmental Science & Technology, Volume 44, Issue 17, Page 6698-6705, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:06 am CEST

Photoreactivity of Carboxylated Single-Walled Carbon Nanotubes in Sunlight: Reactive Oxygen Species Production in Water

Environmental Science & Technology, Volume 44, Issue 17, Page 6674-6679, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:03 am CEST

Impact of Knowledge and Misconceptions on Benefit and Risk Perception of CCS

Environmental Science & Technology, Volume 44, Issue 17, Page 6557-6562, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:03 am CEST

Preliminary Assessment of Avian Stomach Oils: A Vector of Contaminants to Chicks and Potential for Diet Analysis and Biomonitoring

Environmental Science & Technology, Volume 44, Issue 17, Page 6869-6874, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:03 am CEST

Contribution of Li-Ion Batteries to the Environmental Impact of Electric Vehicles

Environmental Science & Technology, Volume 44, Issue 17, Page 6550-6556, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 7:03 am CEST

Dioxin Formations from the Radical/Radical Cross-Condensation of Phenoxy Radicals with 2-Chlorophenoxy Radicals and 2,4,6-Trichlorophenoxy Radicals

Environmental Science & Technology, Volume 44, Issue 17, Page 6745-6751, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:59 am CEST

Using a Modified Electrical Aerosol Detector To Predict Nanoparticle Exposures to Different Regions of the Respiratory Tract for Workers in a Carbon Black Manufacturing Industry

Environmental Science & Technology, Volume 44, Issue 17, Page 6767-6774, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:59 am CEST

Using Spectrophotometric Titrations To Characterize Humic Acid Reactivity at Environmental Concentrations

Environmental Science & Technology, Volume 44, Issue 17, Page 6782-6788, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:56 am CEST

Free Radical Reaction Pathway, Thermochemistry of Peracetic Acid Homolysis, and Its Application for Phenol Degradation: Spectroscopic Study and Quantum Chemistry Calculations

Environmental Science & Technology, Volume 44, Issue 17, Page 6815-6821, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:54 am CEST

Multi-Perspective Analysis and Spatiotemporal Mapping of Air Pollution Monitoring Data

Environmental Science & Technology, Volume 44, Issue 17, Page 6738-6744, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:54 am CEST

Demonstration of Thermal Plasma Gasification/Vitrification for Municipal Solid Waste Treatment

Environmental Science & Technology, Volume 44, Issue 17, Page 6680-6684, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:54 am CEST

Distinguishing Diffusional and Plant Control of Cd and Ni Uptake by Hyperaccumulator and Nonhyperaccumulator Plants

Environmental Science & Technology, Volume 44, Issue 17, Page 6636-6641, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:53 am CEST

Use and Environmental Occurrence of Antibiotics in Freestall Dairy Farms with Manured Forage Fields

Environmental Science & Technology, Volume 44, Issue 17, Page 6591-6600, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:52 am CEST

Ionization Behavior, Stoichiometry of Association, and Accessibility of Functional Groups in the Active Layers of Reverse Osmosis and Nanofiltration Membranes

Environmental Science & Technology, Volume 44, Issue 17, Page 6808-6814, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:51 am CEST

New CO2 Capture Process for Hydrogen Production Combining Ca and Cu Chemical Loops

Environmental Science & Technology, Volume 44, Issue 17, Page 6901-6904, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:51 am CEST

Noninvasive Probing of Inhibitory Effects of Cylindrospermopsin and Microcystin-LR Using Cell-Based Impedance Spectroscopy

Environmental Science & Technology, Volume 44, Issue 17, Page 6775-6781, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:50 am CEST

Impacts of an Anti-Androgen and an Androgen/Anti-Androgen Mixture on the Metabolite Profile of Male Fathead Minnow Urine

Environmental Science & Technology, Volume 44, Issue 17, Page 6881-6886, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:50 am CEST

Time Course of Congener Uptake and Elimination in Rats after Short-Term Inhalation Exposure to an Airborne Polychlorinated Biphenyl (PCB) Mixture

Environmental Science & Technology, Volume 44, Issue 17, Page 6893-6900, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:49 am CEST

Real-Time Management of an Urban Groundwater Well Field Threatened by Pollution

Environmental Science & Technology, Volume 44, Issue 17, Page 6802-6807, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:49 am CEST

Efficient Characterization of Pollutant-Emission Response under Parametric Uncertainty

Environmental Science & Technology, Volume 44, Issue 17, Page 6724-6730, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:49 am CEST

Structure-Based Interpretation of Biotransformation Pathways of Amide-Containing Compounds in Sludge-Seeded Bioreactors

Environmental Science & Technology, Volume 44, Issue 17, Page 6628-6635, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:48 am CEST

Recent Changes in Atmospheric Mercury Deposition Recorded in the Sediments of Remote Equatorial Lakes in the Rwenzori Mountains, Uganda

Environmental Science & Technology, Volume 44, Issue 17, Page 6570-6575, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:47 am CEST

Novel Process of Simultaneous Removal of SO2 and NO2 by Sodium Humate Solution

Environmental Science & Technology, Volume 44, Issue 17, Page 6712-6717, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:46 am CEST

Primary and Embedded Steel Imports to the U.S.: Implications for the Design of Border Tax Adjustments

Environmental Science & Technology, Volume 44, Issue 17, Page 6563-6569, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:45 am CEST

Tracing Natural and Anthropogenic Pb in Sediments along the Mediterranean Coast of Israel Using Pb Isotopes

Environmental Science & Technology, Volume 44, Issue 17, Page 6576-6582, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:45 am CEST

OH Reactivity Measurements within a Boreal Forest: Evidence for Unknown Reactive Emissions

Environmental Science & Technology, Volume 44, Issue 17, Page 6614-6620, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:44 am CEST

Dibutyl Phthalate Contributes to the Thyroid Receptor Antagonistic Activity in Drinking Water Processes

Environmental Science & Technology, Volume 44, Issue 17, Page 6863-6868, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:44 am CEST

Oxidative Potential of Logwood and Pellet Burning Particles Assessed by a Novel Profluorescent Nitroxide Probe

Environmental Science & Technology, Volume 44, Issue 17, Page 6601-6607, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:43 am CEST

Effect of Halide Ions and Carbonates on Organic Contaminant Degradation by Hydroxyl Radical-Based Advanced Oxidation Processes in Saline Waters

Environmental Science & Technology, Volume 44, Issue 17, Page 6822-6828, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:42 am CEST

Theoretical and Experimental Simulation of the Fate of Semifluorinated n-Alkanes during Snowmelt

Environmental Science & Technology, Volume 44, Issue 17, Page 6692-6697, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:40 am CEST

High-Throughput Identification of Microbial Transformation Products of Organic Micropollutants

Environmental Science & Technology, Volume 44, Issue 17, Page 6621-6627, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:38 am CEST

Kinetics of the Hydrolysis of Atmospherically Relevant Isoprene-Derived Hydroxy Epoxides

Environmental Science & Technology, Volume 44, Issue 17, Page 6718-6723, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:37 am CEST

Approach for Estimating Microbial Growth and Biodegradation of Hydrocarbon Contaminants in Subsoil Based on Field Measurements: 2. Application in a Field Lysimeter Experiment

Environmental Science & Technology, Volume 44, Issue 17, Page 6795-6801, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:37 am CEST

Semivolatile Endocrine-Disrupting Compounds in Paired Indoor and Outdoor Air in Two Northern California Communities

Environmental Science & Technology, Volume 44, Issue 17, Page 6583-6590, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:36 am CEST

Past, Present, and Future Controls on Levels of Persistent Organic Pollutants in the Global Environment

Environmental Science & Technology, Volume 44, Issue 17, Page 6526-6531, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:35 am CEST

Platinized WO3 as an Environmental Photocatalyst that Generates OH Radicals under Visible Light

Environmental Science & Technology, Volume 44, Issue 17, Page 6849-6854, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:28 am CEST

Characterization of Soluble Microbial Products and Their Fouling Impacts in Membrane Bioreactors

Environmental Science & Technology, Volume 44, Issue 17, Page 6642-6648, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:26 am CEST

Fenton Activity and Cytotoxicity Studies of Iron-Loaded Carbon Particles

Environmental Science & Technology, Volume 44, Issue 17, Page 6887-6892, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:26 am CEST

An Improved Method for Estimating in Situ Sampling Rates of Nonpolar Passive Samplers

Environmental Science & Technology, Volume 44, Issue 17, Page 6789-6794, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:25 am CEST

High-Level Exposure to Lithium, Boron, Cesium, and Arsenic via Drinking Water in the Andes of Northern Argentina

Environmental Science & Technology, Volume 44, Issue 17, Page 6875-6880, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:24 am CEST

Distribution and Translocation of Selenium from Soil to Grain and Its Speciation in Paddy Rice (Oryza sativa L.)

Environmental Science & Technology, Volume 44, Issue 17, Page 6706-6711, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:24 am CEST

Role of Heterogeneous Precipitation in Determining the Nature of Products Formed on Oxidation of Fe(II) in Seawater Containing Natural Organic Matter

Environmental Science & Technology, Volume 44, Issue 17, Page 6667-6673, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:23 am CEST

Field Measurement of Diffusional Mass Transfer of HOCs at the Sediment-Water Interface

Environmental Science & Technology, Volume 44, Issue 17, Page 6752-6759, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:21 am CEST

Aggregation and Deposition of Engineered Nanomaterials in Aquatic Environments: Role of Physicochemical Interactions

Environmental Science & Technology, Volume 44, Issue 17, Page 6532-6549, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:14 am CEST

Regulate, Baby, Regulate

Environmental Science & Technology, Volume 44, Issue 17, Page 6524-6525, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:14 am CEST

Degradation of Methylmercury and Its Effects on Mercury Distribution and Cycling in the Florida Everglades

Environmental Science & Technology, Volume 44, Issue 17, Page 6661-6666, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:12 am CEST

Degradation and Mineralization of Bisphenol A by Mesoporous Bi2WO6 under Simulated Solar Light Irradiation

Environmental Science & Technology, Volume 44, Issue 17, Page 6843-6848, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:05 am CEST

Visible Light Sensitized Inactivation of MS-2 Bacteriophage by a Cationic Amine-Functionalized C60 Derivative

Environmental Science & Technology, Volume 44, Issue 17, Page 6685-6691, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:05 am CEST

Reduction of Se(IV) in Boom Clay: XAS Solid Phase Speciation

Environmental Science & Technology, Volume 44, Issue 17, Page 6649-6655, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:04 am CEST

Ozonolysis of Maleic Acid Aerosols: Effect upon Aerosol Hygroscopicity, Phase and Mass

Environmental Science & Technology, Volume 44, Issue 17, Page 6656-6660, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:03 am CEST

Monitoring Gene Expression To Evaluate Oxygen Infusion at a Gasoline-Contaminated Site

Environmental Science & Technology, Volume 44, Issue 17, Page 6829-6834, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:03 am CEST

Trends in European Background Air Reflect Reductions in Primary Emissions of PCBs and PBDEs

Environmental Science & Technology, Volume 44, Issue 17, Page 6760-6766, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:00 am CEST

Persistence Dictates Two More R’s

Environmental Science & Technology, Volume 44, Issue 17, Page 6523, September 1, 2010.

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Aug 2010 | 6:00 am CEST

Rapid degradation of carbon tetrachloride by commercial micro-scale zinc powder assisted by citric acid

Abstract  
We developed an effective method for degradation of carbon tetrachloride (CT) in contaminated water. Zinc metal as a reducing agent for CT in aqueous solutions has been previously studied in some detail, but the rapid corrosion of zinc surface usually reduces its efficiency in removing CT. We assumed that citric acid could enhance the degradation of CT by zinc powder due to the elimination of a passivation layer of Zn(II) (hydr)oxides on the surface of zinc powder through chelating of organic ligands with Zn(II) produced from the reaction and keeping the exposure of active sites to targets. Here the influence of citric acid on the decomposing of CT by commercial micro-scale zinc powder was investigated in a pH range of 3.5–7.5 at 25°C in batch experiments. Reaction mixtures were analysed by gas chromatography/headspace analysis, and Cl concentration was determined by turbidimetry. The results demonstrate that the degradation of CT by zinc metal alone is very weak, but the addition of citric acid can assist zinc powder to decompose CT more completely and rapidly at all pHs. Degradation of CT took place mainly in the first 10 min of reaction, coupled with 75–95% of CT removal. Maximum dechlorination percentage (82.4%) of CT was obtained at pH 5.5. In that case, chloroform and dichloromethane, as main intermediates, were found at low levels during the whole reaction, suggesting that CT may be sequentially and multiply degraded so quickly that methane is yielded before the intermediates can be desorbed and released to aqueous solution. When compared with the current methods of nano-scale zinc and bimetallic systems, the application of commercial micro-scale zinc particles assisted by organic ligands is of environmental significance since it allows decontamination of aqueous chlorinated organic compounds at low cost and with high efficiency.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0298-7
  • Authors
    • Xianchao Gao, College of Science, Nanjing Agricultural University, 210095 Nanjing, People’s Republic of China
    • Feng Yang, College of Science, Nanjing Agricultural University, 210095 Nanjing, People’s Republic of China
    • Yeqing Lan, College of Science, Nanjing Agricultural University, 210095 Nanjing, People’s Republic of China
    • J.-D. Mao, Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA
    • Xinyan Duan, College of Science, Nanjing Agricultural University, 210095 Nanjing, People’s Republic of China

Source: Environmental Chemistry Letters (Online First™) | 28 Aug 2010 | 7:56 am CEST

Monitoring and managing responses to climate change at the retreating range edge of forest trees

Alistair S. Jump, Liam Cavin, Peter D. Hunter
(Perspective from J. Environ. Monit.)
Alistair S. Jump, J. Environ. Monit., 2010, DOI: 10.1039/b923773a
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry

Source: RSC - J. Environ. Monit. latest articles | 27 Aug 2010 | 12:00 am CEST

Constructed Wetlands for Wastewater Treatment: Five Decades of Experience†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 Aug 2010 | 7:26 pm CEST

Broadening the Global Reach of the United States Environmental Protection Agency (USEPA) is Vital to Combating Globalized Environmental Problems

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 Aug 2010 | 5:41 pm CEST

Influence of Taxonomic Relatedness and Chemical Mode of Action in Acute Interspecies Estimation Models for Aquatic Species

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 Aug 2010 | 5:40 pm CEST

Flux of Perfluorinated Chemicals through Wet Deposition in Japan, the United States, And Several Other Countries

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 Aug 2010 | 5:22 pm CEST

Plant Growth and Metal Distribution in Tissues of Prosopis juliflora-velutina Grown on Chromium Contaminated Soil in the Presence of Glomus deserticola

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 Aug 2010 | 5:19 pm CEST

Updated Abraham Solvation Parameters for Polychlorinated Biphenyls

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 25 Aug 2010 | 9:55 pm CEST

Mechanisms of Boron Tolerance and Accumulation in Plants: A Physiological Comparison of the Extremely Boron-Tolerant Plant Species, Puccinellia distans, with the Moderately Boron-Tolerant Gypsophila arrostil

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 25 Aug 2010 | 9:52 pm CEST

Corrosive Microenvironments at Lead Solder Surfaces Arising from Galvanic Corrosion with Copper Pipe

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 25 Aug 2010 | 9:51 pm CEST

From Chemical Risk Assessment to Environmental Quality Management: The Challenge for Soil Protection†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 8:16 pm CEST

Investigation of Copper Speciation in Pig Slurry by a Multitechnique Approach

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 7:44 pm CEST

Emission Factors of Particulate Matter and Elemental Carbon for Crop Residues and Coals Burned in Typical Household Stoves in China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 7:34 pm CEST

Membrane-Aerated Biofilm Proton and Oxygen Flux during Chemical Toxin Exposure

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 7:33 pm CEST

Direct Microscopic Observation of Forward Osmosis Membrane Fouling

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 7:31 pm CEST

On the Need to Redesign the CDM Carbon Trading Program

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 6:41 pm CEST

Plasmon-Induced Inactivation of Enteric Pathogenic Microorganisms with Ag−AgI/Al2O3 under Visible-Light Irradiation

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 Aug 2010 | 3:40 pm CEST

The quantification of hydrogen and methane in contaminated groundwater: validation of robust procedures for sampling and quantification

Ute Dorgerloh, Roland Becker, Hubert Thei[German sz ligature}en, Irene Nehls
(Paper from J. Environ. Monit.)
Ute Dorgerloh, J. Environ. Monit., 2010, DOI: 10.1039/c0em00091d
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Source: RSC - J. Environ. Monit. latest articles | 23 Aug 2010 | 12:00 am CEST

Dissolution of cemented carbide powders in artificial sweat: implications for cobalt sensitization and contact dermatitis

Aleksandr B. Stefaniak, Christopher J. Harvey, M. Abbas Virji, Gregory A. Day
(Paper from J. Environ. Monit.)
Aleksandr B. Stefaniak, J. Environ. Monit., 2010, DOI: 10.1039/c0em00269k
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Source: RSC - J. Environ. Monit. latest articles | 23 Aug 2010 | 12:00 am CEST

Atlantic Ocean Surface Waters Buffer Declining Atmospheric Concentrations of Persistent Organic Pollutants

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 8:40 pm CEST

FTIR Product Distribution Study of the Cl and OH Initiated Degradation of Methyl Acrylate at Atmospheric Pressure

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 2:42 pm CEST

Visible-Light-Induced Bactericidal Activity of Titanium Dioxide Codoped with Nitrogen and Silver

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 2:41 pm CEST

Polybrominated Diphenylethers (PBDEs) Alter Larval Settlement of Marine Benthic Polychaetes

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 2:40 pm CEST

Assessment of PDMS-Water Partition Coefficients: Implications for Passive Environmental Sampling of Hydrophobic Organic Compounds

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 2:37 pm CEST

Comparing Linear Free Energy Relationships for Organic Chemicals in Soils: Effects of Soil and Solute Properties

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 2:35 pm CEST

Human Virus and Bacteriophage Inactivation in Clear Water by Simulated Sunlight Compared to Bacteriophage Inactivation at a Southern California Beach

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 20 Aug 2010 | 2:34 pm CEST

Recalcitrance – dead and buried?

Kevin A. Francesconi, Jon Chorover - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

What is recalcitrant soil organic matter?

Markus Kleber - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Field intercomparison on the determination of volatile and semivolatile polyfluorinated compounds in air

Annekatrin Dreyer, Mahiba Shoeib, Stefan Fiedler, Jon Barber, Tom Harner, Karl-Werner Schramm, Kevin C. Jones, Ralf Ebinghaus - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

News

(News from J. Environ. Monit.)
J. Environ. Monit., 2010, DOI: 10.1039/c0em90016h
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Source: RSC - J. Environ. Monit. latest articles | 20 Aug 2010 | 12:00 am CEST

Dissipation of sulfamethoxazole, trimethoprim and tylosin in a soil under aerobic and anoxic conditions

Feng Liu, Guang-Guo Ying, Ji-Feng Yang, Li-Jun Zhou, Ran Tao, Li Wang, Li-Juan Zhang, Ping-An Peng - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Characterisation of structural and surface speciation of representative commercially available cerium oxide nanoparticles

M. Baalousha, P. Le Coustumer, I. Jones, J. R. Lead - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Variations of aerosol properties due to regional source contributions and impacts on ozone levels:a study in a south China city

Ka-Ming Wai, Peter A. Tanner - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Evidence for arsenic-driven redox chemistry in a wetland system: a field voltammetric study

L. Haffert, S. G. Sander, K. A. Hunter, D. Craw - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Response to the Opinion paper by Margit von Lützow and Ingrid Kögel-Knabner on 'What is recalcitrant soil organic matter?' by Markus Kleber

Markus Kleber - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Response to the Concept paper: 'What is recalcitrant soil organic matter?' by Markus Kleber

Margit von Lützow, Ingrid Kögel-Knabner - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Composition profile of oxygenated organic compounds and inorganic ions in PM 2.5 in Hong Kong

Yun Chun Li, Jian Zhen Yu - Volume 7(4)

Source: Environmental Chemistry | 20 Aug 2010 | 12:00 am CEST

Capture and Recovery of Isobutane by Electrothermal Swing Adsorption with Post-Desorption Liquefaction

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 19 Aug 2010 | 8:58 pm CEST

Deployment Models for Commercialized Carbon Capture and Storage†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 19 Aug 2010 | 8:53 pm CEST

Pre- and Postnatal Exposure to Perfluorinated Compounds (PFCs)

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 19 Aug 2010 | 7:41 pm CEST

In silico screening for unmonitored, potentially problematic high production volume (HPV) chemicals prone to sequestration in biosolids

Randhir P. Deo, Rolf U. Halden
(Paper from J. Environ. Monit.)
Randhir P. Deo, J. Environ. Monit., 2010, DOI: 10.1039/c001559h
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Source: RSC - J. Environ. Monit. latest articles | 19 Aug 2010 | 12:00 am CEST

Monitoring of pesticide residues in dairy cattle farms from NW Spain

Maria Fernandez-Alvarez, J. Pablo Lamas, Maria Garcia-Chao, Carmen Garcia-Jares, Maria Llompart, Marta Lores, Thierry Dagnac
(Paper from J. Environ. Monit.)
Maria Fernandez-Alvarez, J. Environ. Monit., 2010, DOI: 10.1039/c0em00054j
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Source: RSC - J. Environ. Monit. latest articles | 19 Aug 2010 | 12:00 am CEST

Physiologically Based Pharmacokinetic (PBPK) Models for Lifetime Exposure to PCB 153 in Male and Female Harbor Porpoises (Phocoena phocoena): Model Development and Evaluation

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 8:08 pm CEST

Oxidation Reactions Mediated by Single-Walled Carbon Nanotubes in Aqueous Solution

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:29 pm CEST

Uptake of Methacrolein and Methyl Vinyl Ketone by Tree Saplings and Implications for Forest Atmosphere

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:28 pm CEST

Impact of Chlorine Disinfectants on Dissolution of the Lead Corrosion Product PbO2

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:27 pm CEST

In Situ Production of Methylmercury within a Stream Channel in Northern California

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:27 pm CEST

Adsorption of Dialkyl Phthalate Esters on Carbon Nanotubes

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:26 pm CEST

Photo-Oxidation of Cr(III)−Citrate Complexes Forms Harmful Cr(VI)

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:25 pm CEST

Seasonal Distribution and Genetic Diversity of Genogroups I, II, and IV Noroviruses in the Tamagawa River, Japan

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 18 Aug 2010 | 1:24 pm CEST

Spatial Distribution of Diesel Transit Bus Emissions and Urban Populations: Implications of Coincidence and Scale on Exposure

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 17 Aug 2010 | 5:33 pm CEST

Effect of Metal Ions on the Indigenous Radicals of Humic Acids: High Field Electron Paramagnetic Resonance Study

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 17 Aug 2010 | 2:36 pm CEST

Perchlorate and Iodide in Whole Blood Samples from Infants, Children, and Adults in Nanchang, China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 17 Aug 2010 | 2:35 pm CEST

Reductive Dechlorination of α-, β-, γ-, and δ-Hexachlorocyclohexane Isomers with Hydroxocobalamin, in Soil Slurry Systems

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 17 Aug 2010 | 2:34 pm CEST

Cathode Potential and Mass Transfer Determine Performance of Oxygen Reducing Biocathodes in Microbial Fuel Cells

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 17 Aug 2010 | 2:34 pm CEST

Proteomics Analysis of Flax Grown in Chernobyl Area Suggests Limited Effect of Contaminated Environment on Seed Proteome

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 17 Aug 2010 | 2:33 pm CEST

Chemical Sinks of Organic Aerosol: Kinetics and Products of the Heterogeneous Oxidation of Erythritol and Levoglucosan

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 16 Aug 2010 | 1:12 pm CEST

Evidence of Reactive Aromatics As a Major Source of Peroxy Acetyl Nitrate over China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 16 Aug 2010 | 1:11 pm CEST

Effects of Nonionic Surfactant Addition on Populations of Polycyclic Aromatic Hydrocarbon-Degrading Bacteria in a Bioreactor Treating Contaminated Soil†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 13 Aug 2010 | 9:14 pm CEST

Abundance and Diversity of Tetracycline Resistance Genes in Soils Adjacent to Representative Swine Feedlots in China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 13 Aug 2010 | 8:53 pm CEST

Bioaccumulation of Organic Contaminants in Humans: A Multimedia Perspective and the Importance of Biotransformation†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 11 Aug 2010 | 4:45 pm CEST

Mesoscale Carbon Sequestration Site Screening and CCS Infrastructure Analysis†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 10 Aug 2010 | 7:47 pm CEST

In planta Engineering of Gold Nanoparticles of Desirable Geometries by Modulating Growth Conditions: An Environment-Friendly Approach

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 10 Aug 2010 | 7:47 pm CEST

On-Road Vehicle Emission Control in Beijing: Past, Present, and Future†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 9 Aug 2010 | 1:40 pm CEST

Spatial and temporal pattern of pesticides in the global atmosphere

Chubashini Shunthirasingham, Catherine E. Oyiliagu, Xiaoshu Cao, Todd Gouin, Frank Wania, Sum-Chi Lee, Karla Pozo, Tom Harner, Derek C. G. Muir
(Paper from J. Environ. Monit.)
Chubashini Shunthirasingham, J. Environ. Monit., 2010, DOI: 10.1039/c0em00134a
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Source: RSC - J. Environ. Monit. latest articles | 9 Aug 2010 | 12:00 am CEST

Background wet deposition of mercury in Great Britain

A. P. Rowland, A. J. Lawlor, H. J. Guyatt, R. A. Wadsworth
(Paper from J. Environ. Monit.)
A. P. Rowland, J. Environ. Monit., 2010, DOI: 10.1039/c0em00086h
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Source: RSC - J. Environ. Monit. latest articles | 9 Aug 2010 | 12:00 am CEST

Terephthalate as a probe for photochemically generated hydroxyl radical

Sarah E. Page, William A. Arnold, Kristopher McNeill
(Paper from J. Environ. Monit.)
Sarah E. Page, J. Environ. Monit., 2010, DOI: 10.1039/c0em00160k
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Source: RSC - J. Environ. Monit. latest articles | 9 Aug 2010 | 12:00 am CEST

Comments on "A new look at low-energy nuclear reaction research"

Kirk L. Shanahan
(Letter from J. Environ. Monit.)
Kirk L. Shanahan, J. Environ. Monit., 2010, DOI: 10.1039/c001299h
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Source: RSC - J. Environ. Monit. latest articles | 6 Aug 2010 | 12:00 am CEST

A new look at low-energy nuclear reaction (LENR) research: a response to Shanahan

J. Marwan, M. C. H. McKubre, F. L. Tanzella, P. L. Hagelstein, M. H. Miles, M. R. Swartz, Edmund Storms, Y. Iwamura, P. A. Mosier-Boss, L. P. G. Forsley
(Letter from J. Environ. Monit.)
J. Marwan, J. Environ. Monit., 2010, DOI: 10.1039/c0em00267d
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Source: RSC - J. Environ. Monit. latest articles | 6 Aug 2010 | 12:00 am CEST

Multiphase Electrode Microbial Fuel Cell System that Simultaneously Converts Organics Coexisting in Water and Sediment phases into Electricity

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 5 Aug 2010 | 5:31 pm CEST

Monitoring North Sea oil production discharges using passive sampling devices coupled with in vitro bioassay techniques

Christopher Harman, Eivind Farmen, Knut Erik Tollefsen
(Paper from J. Environ. Monit.)
Christopher Harman, J. Environ. Monit., 2010, DOI: 10.1039/c0em00147c
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Source: RSC - J. Environ. Monit. latest articles | 4 Aug 2010 | 12:00 am CEST

Modeling Miscanthus in the Soil and Water Assessment Tool (SWAT) to Simulate Its Water Quality Effects As a Bioenergy Crop

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 3 Aug 2010 | 5:25 pm CEST

Nitrate in United Kingdom Rivers: Policy and Its Outcomes Since 1970†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 3 Aug 2010 | 3:03 pm CEST

Heavy metals, occurrence and toxicity for plants: a review

Abstract  
Metal contamination issues are becoming increasingly common in India and elsewhere, with many documented cases of metal toxicity in mining industries, foundries, smelters, coal-burning power plants and agriculture. Heavy metals, such as cadmium, copper, lead, chromium and mercury are major environmental pollutants, particularly in areas with high anthropogenic pressure. Heavy metal accumulation in soils is of concern in agricultural production due to the adverse effects on food safety and marketability, crop growth due to phytotoxicity, and environmental health of soil organisms. The influence of plants and their metabolic activities affects the geological and biological redistribution of heavy metals through pollution of the air, water and soil. This article details the range of heavy metals, their occurrence and toxicity for plants. Metal toxicity has high impact and relevance to plants and consequently it affects the ecosystem, where the plants form an integral component. Plants growing in metal-polluted sites exhibit altered metabolism, growth reduction, lower biomass production and metal accumulation. Various physiological and biochemical processes in plants are affected by metals. The contemporary investigations into toxicity and tolerance in metal-stressed plants are prompted by the growing metal pollution in the environment. A few metals, including copper, manganese, cobalt, zinc and chromium are, however, essential to plant metabolism in trace amounts. It is only when metals are present in bioavailable forms and at excessive levels, they have the potential to become toxic to plants. This review focuses mainly on zinc, cadmium, copper, mercury, chromium, lead, arsenic, cobalt, nickel, manganese and iron.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0297-8
  • Authors
    • P. C. Nagajyoti, Hanyang University Institute of Environmental & Industrial Medicine (IEIM) Seoul South Korea
    • K. D. Lee, Dongguk University Department of Nanomaterial Chemistry Gyeongju Republic of Korea
    • T. V. M. Sreekanth, Dongguk University Department of Nanomaterial Chemistry Gyeongju Republic of Korea

Source: Environmental Chemistry Letters (Online First™) | 28 Jul 2010 | 7:42 pm CEST

Biofuel vs Bioinvasion: Seeding Policy Priorities

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 22 Jul 2010 | 8:30 pm CEST

High-Throughput Screening of Silver Nanoparticle Stability and Bacterial Inactivation in Aquatic Media: Influence of Specific Ions

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 12 Jul 2010 | 4:50 pm CEST

Modified β-cyclodextrins as prospective agents for improving water solubility of organic pesticides

Abstract  
The drawback of some organic pesticides is their low water solubility. Cyclodextrins are used as agents for improving pesticides water solubility. However, the stabilization of the crystalline lattice can reduces to a large extent the solubility of cyclodextrins, especially β-cyclodextrin. Here, searching for the water soluble β-cyclodextrin derivatives, a set of new “host” compounds were prepared by the reaction of β-cyclodextrin with methyl epoxycinnamate. The reactants ratio was varied in to study the substitution degree of the obtained derivatives. The structure was determined by the 1H-NMR and FT IR spectra. The average degree of substitution was determined by integration of the corresponding NMR signals and by elemental analysis. The solubility of four selected pesticides: dimethoate, simazine, linuron and thiram, in water with and without addition of the new modified β-cyclodextrin was measured by ultraviolet spectrophotometry. Our results showed that the modified β-cyclodextrins significantly improve solubility of pesticides.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0296-9
  • Authors
    • G. Petrović, University of Niš Faculty of Mathematics and Natural Sciences Višegradska 33 18 000 Niš Serbia
    • G. Stojanović, University of Niš Faculty of Mathematics and Natural Sciences Višegradska 33 18 000 Niš Serbia
    • R. Palić, University of Niš Faculty of Mathematics and Natural Sciences Višegradska 33 18 000 Niš Serbia

Source: Environmental Chemistry Letters (Online First™) | 7 Jul 2010 | 6:34 pm CEST

Biocatalytic dechlorination of hexachlorocyclohexane by immobilized bio-Pd in a pilot scale fluidized bed reactor

Abstract  
Lindane (γ-hexachlorocyclohexane, γ-HCH) is a recalcitrant and toxic organochlorine insecticide. Due to its non-selective production process and widespread use, HCH isomers and their degradation products have been detected frequently in soils and groundwater. An innovative technology using microbial produced Pd(0) nanoparticles, i.e. bio-Pd, was developed to treat groundwater containing a mixture of HCHs and chlorobenzenes. In a first step, the groundwater was de-ironized and most of the chlorobenzenes were removed in a biological trickling filter. The μg L−1 levels of HCHs and chlorobenzenes were removed in a second step by the bio-Pd-based technology. Therefore, a 200-L pilot scale reactor was developed with 100 mg L−1 bio-Pd encapsulated in alginate beads. Hydrogen gas was bubbled at the bottom of the reactor and served to charge the bio-Pd catalyst. The reactor influent contained 5.2 μg L−1 HCHs and 51.1 μg L−1 chlorobenzenes. During a test period of 10 days, 29% of the HCH isomers and 63% of the chlorobenzenes were removed applying a nominal hydraulic residence time of 4 h. These removal percentages could be increased to 75 and 68% by doubling the nominal hydraulic residence time to 8 h. This study demonstrated that biologically produced nanoparticles of Pd can be applied for the large-scale remediation of groundwater contaminated with HCHs.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0295-x
  • Authors
    • Tom Hennebel, Ghent University Laboratory of Microbial Ecology and Technology (LabMET) Coupure Links 653 9000 Ghent Belgium
    • Henri Simoen, Ghent University Laboratory of Microbial Ecology and Technology (LabMET) Coupure Links 653 9000 Ghent Belgium
    • Pieter Verhagen, Ghent University Laboratory of Microbial Ecology and Technology (LabMET) Coupure Links 653 9000 Ghent Belgium
    • Wim De Windt, Biorem Engineering Avenue de la Concorde 847 62780 Stella Plage France
    • Jan Dick, Avecom, Industriepark Wondelgem Haven 9000, Industrieweg 122 P 9032 Wondelgem Belgium
    • Christian Weise, Bauer Umwelt GmbH In der Scherau 1 86529 Schrobenhausen Germany
    • Frank Pietschner, Bauer Umwelt GmbH In der Scherau 1 86529 Schrobenhausen Germany
    • Nico Boon, Ghent University Laboratory of Microbial Ecology and Technology (LabMET) Coupure Links 653 9000 Ghent Belgium
    • Willy Verstraete, Ghent University Laboratory of Microbial Ecology and Technology (LabMET) Coupure Links 653 9000 Ghent Belgium

Source: Environmental Chemistry Letters (Online First™) | 7 Jul 2010 | 8:51 am CEST

Surfactant-Enhanced Desorption and Biodegradation of Polycyclic Aromatic Hydrocarbons in Contaminated Soil

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 30 Jun 2010 | 1:18 pm CEST

Partial Nitrification/Denitrification Can Be Attributed to the Slow Response of Nitrite Oxidizing Bacteria to Periodic Anoxic Disturbances

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 28 Jun 2010 | 8:41 pm CEST

Cu and Pb accumulation by the marine diatom Thalassiosira weissflogii in the presence of humic acids

Paula Sánchez-Marín, Vera I. Slaveykova, Ricardo Beiras - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Palladium(II) sequestration by phytate in aqueous solution – speciation analysis and ionic medium effects

Antonio Gianguzza, Demetrio Milea, Alberto Pettignano, Silvio Sammartano - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Relationships between atmospheric organic compounds and air-mass exposure to marine biology

S. R. Arnold, D. V. Spracklen, S. Gebhardt, T. Custer, J. Williams, I. Peeken, S. Alvain - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Tolerance of seven perennial grasses to high nickel in sand culture

P. M. Kopittke, F. P. C. Blamey, R. A. Kopittke, C. J. Asher, N. W. Menzies - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Monitoring advanced oxidation of Suwannee River fulvic acid

Janey V. Camp, Dennis B. George, Martha J. M. Wells, Pedro E. Arce - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Dynamic features of speciation analysis by adsorptive stripping techniques

Raewyn M. Town, Herman P. van Leeuwen - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Quantitative determination of fullerene (C 60 ) in soils by high performance liquid chromatography and accelerated solvent extraction technique

Ali Shareef, Guihua Li, Rai S. Kookana - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Environmental Chemistry: New international team of editors

Kevin A. Francesconi - Volume 7(3)

Source: Environmental Chemistry | 22 Jun 2010 | 12:00 am CEST

Influence of pH and Inorganic Phosphate on Toxicity of Zinc to Arthrobacter sp. Isolated from Heavy-Metal-Contaminated Sediments

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 16 Jun 2010 | 9:50 pm CEST

Comparative Human Cell Toxicogenomic Analysis of Monohaloacetic Acid Drinking Water Disinfection Byproducts

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 11 Jun 2010 | 8:07 pm CEST

Uses and Biases of Volunteer Water Quality Data

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 11 Jun 2010 | 5:32 pm CEST

Dispersion and Stability Optimization of TiO2 Nanoparticles in Cell Culture Media

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 10 Jun 2010 | 4:00 pm CEST

Rapid incorporation and short-term distribution of a nonylphenol isomer and the herbicide MCPA in soil-derived organo-clay complexes

Abstract  
Organo-clay complexes in soil are a major sink for xenobiotics and, thus, often enhance their persistence dramatically. However, the knowledge on environmental processes of non-extractable residue formation on a short time scale is very restricted. Therefore, this study examined the distribution of 4-(3,5-dimethylhept-3-yl)phenol (NP) and 4-chloro-2-methylphenoxyacetic acid (MCPA) in soil over a short time period of 48 h and in different soil sub-fractions. The overall proportion of organo-clay-associated bound residues was not only abundant but also in the same range for both substances (MCPA: 8%; NP: 11% of applied 14C-radioactivity). However, a more detailed view revealed two different distribution patterns: a higher proportion of clay-associated NP was accompanied by a lower content of bound residues, whereas a smaller fraction of clay-associated MCPA was characterized by a higher proportion of non-extractable residues. Further on, a selective accumulation of bound residues among clay-associated humic fractions was observed. NP residues were linked predominantly to humic acids, whereas MCPA residues tended to be incorporated more into fulvic acids. It was evident that the overall distribution was influenced primarily by the physico-chemical properties of the contaminants. This study demonstrates in detail a rapid initial incorporation accompanied by a specific distribution into soil sub-fractions for selected xenobiotics in soil and points to a complex interaction of clay-associated organic matter with low molecular weight compounds.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0294-y
  • Authors
    • Patrick Riefer, RWTH Aachen University Institute for Geology and Geochemistry of Petroleum and Coal Lochnerstr. 4-20 52056 Aachen Germany
    • Timm Klausmeyer, RWTH Aachen University Institute of Environmental Biology and Chemodynamics Woringerweg 1 52074 Aachen Germany
    • Jan Schwarzbauer, RWTH Aachen University Institute for Geology and Geochemistry of Petroleum and Coal Lochnerstr. 4-20 52056 Aachen Germany
    • Andreas Schäffer, RWTH Aachen University Institute of Environmental Biology and Chemodynamics Woringerweg 1 52074 Aachen Germany
    • Burkhard Schmidt, RWTH Aachen University Institute of Environmental Biology and Chemodynamics Woringerweg 1 52074 Aachen Germany
    • Phillipe F. X. Corvini, University of Applied Science Northwestern Switzerland Institute for Ecopreneurship Gründenstr. 40 4132 Muttenz Switzerland

Source: Environmental Chemistry Letters (Online First™) | 2 Jun 2010 | 6:57 pm CEST

Removal of carbamazepine from urban wastewater by sulfate radical oxidation

Abstract  
The occurrence of bioactive trace pollutants such as pharmaceuticals in natural waters is an emerging issue. Numerous pharmaceuticals are not completely removed in conventional wastewater treatment plants. Advanced oxidation processes may represent an interesting alternative to completely mineralize organic trace pollutants. In this article, we show that sulfate radicals generated from peroxymonosulfate/CoII are more efficient than hydroxyl radicals generated from the Fenton’s reagent (H2O2/FeII) for the degradation of the pharmaceutical compound, carbamazepine. The second-order rate constant for the reaction of SO4 ·− with carbamazepine is 1.92·109 M−1 s−1. In laboratory grade water and in real urban wastewater, SO4 ·− yielded a faster degradation of carbamazepine compared to HO· . Under strongly oxidizing conditions, a nearly complete mineralization of carbamazepine was achieved, while under mildly oxidizing conditions, several intermediates were identified by LC–MS. These results show for the first time in real urban wastewater that sulfate radicals are more selective than hydroxyl radicals for the oxidation of an organic pollutant and may represent an interesting alternative in advanced oxidation processes.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0285-z
  • Authors
    • Roger Matta, Aix-Marseille Université Laboratoire Chimie Provence (UMR6264) 3 Place Victor Hugo 13331 Marseille France
    • Sabrine Tlili, Aix-Marseille Université Laboratoire Chimie Provence (UMR6264) 3 Place Victor Hugo 13331 Marseille France
    • Serge Chiron, Aix-Marseille Université Laboratoire Chimie Provence (UMR6264) 3 Place Victor Hugo 13331 Marseille France
    • Stéphane Barbati, Aix-Marseille Université Laboratoire Chimie Provence (UMR6264) 3 Place Victor Hugo 13331 Marseille France

Source: Environmental Chemistry Letters (Online First™) | 2 Jun 2010 | 4:08 pm CEST

Two-Phase Partitioning Bioreactors Operating with Polymers Applied to the Removal of Substituted Phenols

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 28 May 2010 | 2:28 pm CEST

Trends in Antibiotic Resistance Genes Occurrence in the Haihe River, China

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 28 May 2010 | 2:28 pm CEST

Understanding the Physiological and Molecular Mechanism of Persistent Organic Pollutant Uptake and Detoxification in Cucurbit Species (Zucchini and Squash)

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 27 May 2010 | 2:21 pm CEST

Diversity of Benzyl- and Alkylsuccinate Synthase Genes in Hydrocarbon-Impacted Environments and Enrichment Cultures

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 May 2010 | 8:58 pm CEST

Biogeochemical Changes and Mercury Methylation beneath an In-Situ Sediment Cap†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 26 May 2010 | 6:35 pm CEST

Concentration, Chlorination, and Chemical Analysis of Drinking Water for Disinfection Byproduct Mixtures Health Effects Research: U.S. EPA’s Four Lab Study

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 24 May 2010 | 9:52 pm CEST

An efficient fluorescent polymer sensing material for detection of traces of benzo[a]pyrene in environmental samples

Abstract  
A selective sensing polymer for detecting the air pollution marker benzo[a]pyrene (B[a]P) was prepared by molecular imprinting. When the B[a]P adsorb onto the polymer at an excited wavelength 266 nm, it emits a characteristic signal at 432 nm. The intensity of fluorescence signal corresponds to the concentration of B[a]P adsorbed onto the polymer. The cross-selectivity of the sensing polymer using other 5 PAHs was proven by comparing fluorescence intensities, and the effect of matrix in terms of total dissolved solids on sensing property of the polymer was evaluated. Using this polymeric sensor, it is possible to detect 1 part per trillion (ppt) concentration of B[a]P in environmental samples without laborious solvent extraction procedure generally used in gas chromatograph analysis.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0291-1
  • Authors
    • Reddithota J. Krupadam, National Environmental Engineering Research Institute Nagpur 440 020 India

Source: Environmental Chemistry Letters (Online First™) | 19 May 2010 | 7:58 pm CEST

Sequential extraction of cadmium in different soil phases and plant parts from a former industrialized area

Abstract  
Cd concentrations in mobile phases of soil are more representative than total Cd concentration for estimating Cd bioavailability, physicochemical reactivity and mobility. In this study, selective sequential extraction procedures were used to determine Cd in different soil phases. Soil samples and plants grown in these soils were collected from a serpentine and copper-mining area in Maden-Elazig-Turkey. The extracted fractions were exchangeable/carbonate, reducible-iron/manganese oxides, oxidizable-organic matter and sulfides, and residual phases except silicates. Concentrations of Cd in soils and plant samples were determined by flame atomic absorption spectrometry and inductively coupled plasma-mass spectrometry. We found that Cd concentrations in the EDTA and NH2OH·HCl extracts are higher in most soil samples compared to the other extracts. We conclude that Cd levels in mobile phases are unexpectedly high. The observed Cd concentrations are in ranges of 0.03–3.4 mg kg−1 for soil and 0.02–2.5 mg kg−1 for plant parts. The percentages of cadmium up to 56% in exchangeable and carbonates fractions were observed to be significantly higher than in those values less than 2% reported in literature. This study has shown that the modified extraction method can be usefully applied to determine Cd concentrations in potentially mobile phase of soil. Furthermore, it was concluded that Brassicasea and Rumex leaves can be used as hyperaccumulator plants because their translocation factor and/or enrichment coefficient values were found to be higher than 1.0.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0292-0
  • Authors
    • Olcay Kaplan, Tunceli University Engineering Faculty, Department of Food Sciences Tunceli Turkey
    • Muharrem Ince, Mus Alparslan University Education Faculty, Department of Sciences Mus Turkey
    • Mehmet Yaman, Firat University Sciences and Arts Faculty, Department of Chemistry Universite mah 23119 Elazig Turkey

Source: Environmental Chemistry Letters (Online First™) | 19 May 2010 | 7:58 pm CEST

Voltammetric analysis of metallothioneins and copper (II) in fish for water biomonitoring studies

Abstract  
An major research area in environmental chemistry is the development of methods for the analysis of biomarkers. Metallothioneins are used as biomarkers in studies of heavy metals exposure in water, because metallothioneins are synthesized and accumulated when organisms are exposed to toxic concentrations of pollutants. In this work, simple and sensitive voltammetric methods were developed for metallothionein and copper (II) determinations in fish liver Lepomis gibbosus. Both analytical methodologies were optimized and applied to samples extracted from individuals previously submitted to sub-lethal toxicological trials with copper sulphate (CuSO4) and cadmium chloride (CdCl2). The obtained results showed that both methods are very precise, sensitive, and involve simple sample preparation processes. Moreover, metallothioneins showed better correlation with the toxic exposure than Cu2+. To the best of our knowledge, this is the first time that hepatic metallothioneins and Cu2+ contents are voltammetrically determined in order to be compared in their function as heavy metal biological indicators.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0293-z
  • Authors
    • Pedro Gonçalves Rodrigues, University of Porto REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences Rua do Campo Alegre, 687 4169-007 Porto Portugal
    • Luís Moreira Gonçalves, University of Porto REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences Rua do Campo Alegre, 687 4169-007 Porto Portugal
    • Paulo Jorge Magalhães, University of Porto REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences Rua do Campo Alegre, 687 4169-007 Porto Portugal
    • João Grosso Pacheco, University of Porto REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences Rua do Campo Alegre, 687 4169-007 Porto Portugal
    • José António Rodrigues, University of Porto REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences Rua do Campo Alegre, 687 4169-007 Porto Portugal
    • Aquiles Araújo Barros, University of Porto REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences Rua do Campo Alegre, 687 4169-007 Porto Portugal

Source: Environmental Chemistry Letters (Online First™) | 19 May 2010 | 7:58 pm CEST

Impacts of Metal Oxide Nanoparticles on Marine Phytoplankton

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 14 May 2010 | 7:23 pm CEST

Multivariate Examination of Fe(II)/Fe(III) Cycling and Consequent Hydroxyl Radical Generation†

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 14 May 2010 | 4:39 pm CEST

Enhanced dechlorination of chlorobenzene by microwave-induced zero-valent iron: particle effects and activation energy

Abstract  
Organic compounds such as chlorobenzene cannot be effectively decomposed with currently available biological and chemical treatment methods. Preliminary studies show that nano-scale zero-valent iron particles irradiated by microwave is effective in decomposing chemically refractive organic compounds such as chlorobenzene. In this study, microwave is applied to enhance chlorobenzene removal using micron-scale iron particles and nano-scale zero-valent iron particles suspended in the chlorobenzene solution as the dielectric media. The results show that better chlorobenzene removal can be achieved when the chlorobenzene solution is irradiated with 250 W microwave for 150 s than without microwave irradiation. The microwave radiation increases iron reaction rate and surface activity, thus enhancing the chlorobenzene removal. The microwave-induced iron particles cause the chlorobenzene activation energy to drop 34.0% for micron-scale iron and 16.1% for nano-scale zero-valent iron. They can remove 13.6 times more chlorobenzene for micro iron, and 3.6 times more chlorobenzene for nano iron. We have demonstrated that the microwave-induced nano-scale iron particles are effective in treating toxic organic substances as demonstrated in this laboratory study.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0286-y
  • Authors
    • Chien-Li Lee, Diwan University Department of Leisure and Recreation Management Tainan Taiwan
    • Hsien-Yi Lee, National Kaohsiung First University of Science & Technology Department of Construction Engineering Kaohsiung Taiwan
    • Kuo-Hung Tseng, National Kaohsiung First University of Science & Technology Department of Construction Engineering Kaohsiung Taiwan
    • P. K. Andy Hong, University of Utah Department of Civil and Environmental Engineering 122 So. Central Campus Dr., 104 CME Salt Lake City UT USA
    • Chih-Ju G. Jou, National Kaohsiung First University of Science and Technology Department of Safety, Health and Environmental Engineering Kaohsiung Taiwan

Source: Environmental Chemistry Letters (Online First™) | 12 May 2010 | 9:45 am CEST

Stereoselective toxicity of malathion and its metabolites, malaoxon and isomalathion

Abstract  
In recent years, the stereoselective toxicity of chiral organophosphorus pesticides has received increasing attention from environmental toxicology scientists. In an attempt to explore the stereoselective effects of chiral organophosphorus pesticides on non-target organisms and enzymes, this work investigated the stereoselective toxicity and inhibition of malathion, malaoxon and isomalathion on Daphnia magna and on acid α-naphthyl acetate esterase extracted from wheat flour, respectively. Toxicity differences were observed between the two enantiomers of malathion and malaoxon and among the four stereoisomers of isomalathion in the LC50 values on D. magna and the IC50 values on acid α-naphthyl acetate esterase. Enantiomers with (R)-configuration in all the tested compounds showed higher toxicity to D. magna than their (S)-forms and racemic forms. Racemic malaoxon and isomalathion showed the strongest inhibition on acid α-naphthyl acetate esterase compared to their respective enantiomers and stereoisomers.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0288-9
  • Authors
    • Anping Zhang, Zhejiang University of Technology College of Biological and Environmental Engineering 310014 Hangzhou People’s Republic of China
    • Xuemei Xie, Zhejiang University of Technology College of Biological and Environmental Engineering 310014 Hangzhou People’s Republic of China
    • Jing Ye, Zhejiang University of Technology College of Biological and Environmental Engineering 310014 Hangzhou People’s Republic of China
    • Chunmian Lin, Zhejiang University of Technology College of Biological and Environmental Engineering 310014 Hangzhou People’s Republic of China
    • Xiaoyan Hu, Zhejiang University of Technology College of Biological and Environmental Engineering 310014 Hangzhou People’s Republic of China

Source: Environmental Chemistry Letters (Online First™) | 12 May 2010 | 9:45 am CEST

Sensitive and selective determination of phenylhydrazine in the presence of hydrazine at a ferrocene-modified carbon nanotube paste electrode

Abstract  
The determination of hydrazine derivatives is of special interest because they are toxic and widely used in industry, agriculture and explosives. Electrochemical analysis has become of growing importance in industrial process control, environmental monitoring, and different applications in medicine and biotechnology. In the present work, we used a carbon paste electrode modified by ferrocene and carbon nanotubes for simultaneous determination of phenylhydrazine and hydrazine. The modified electrode showed an excellent character for electrocatalytic oxidization of phenylhydrazine and hydrazine with a 310 mV separation of both peaks. Differential pulse voltammetric peak currents of phenylhydrazine and hydrazine increased linearly with their concentrations at the range of 0.85–700 and 16–800 μM, and the detection limits (3σ) were determined to be 0.6 and 14 μM, respectively. Here, we show that this electrode could be used as an electrochemical sensor for determination of phenylhydrazine and hydrazine in real samples (water and urine) with advantages such as short time of analysis, lack of pretreatment procedures and more cheaper in comparison with some routine analysis methods such as chromatography or spectroscopy. The modified electrode showed good reproducibility, remarkable long-term stability, and especially good surface renewability by simple mechanical polishing.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0289-8
  • Authors
    • Dariush Afzali, International Center for Sciences, High Technology and Environmental Environmetal Department, Research Institute of Environmental Sciences Kerman Iran
    • Hassan Karimi-Maleh, Islamic Azad University Department of Chemistry Qaemshahr Iran
    • Mohammad Ali Khalilzadeh, Islamic Azad University Department of Chemistry Qaemshahr Iran

Source: Environmental Chemistry Letters (Online First™) | 12 May 2010 | 9:45 am CEST

Sorption of DDTs on biofilms, suspended particles and river sediments: effects of heavy metals

Abstract  
The sorption by solid materials is one of the most important processes that affect the fate of hydrophobic organic pollutants in aquatic systems. Current studies focus on the sorption of hydrophobic pollutants by single natural solid material, whereas few studies compared the sorption behaviors of different solids. Furthermore, natural aquatic environment is a complex system where hydrophobic pollutants coexist with many other pollutants, but only limited studies reported the effects of coexisting components on the sorption. Here we studied the sorption of dichlorodiphenyltrichloroethanes (DDTs) by three common solids in natural water, i.e., biofilms, suspended particles and sediments. The effects of typical coexisting heavy metals on the sorption were also examined. The results show that the sorption is described by a dual-mode sorption model. Compared with sediments, more DDTs were sorbed by biofilms and suspended particles. Coexisting Pb, Cd and Cu increased the sorption of DDTs on sediments while decreasing the sorption on biofilms slightly, with little effect on the sorption on suspended particles. The different sorption behaviors of the solids were mainly determined by the composition of the solids: more organics were observed in biofilms and suspended particles.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0287-x
  • Authors
    • Deming Dong, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China
    • Zhiyong Guo, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China
    • Xiuyi Hua, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China
    • Ying Lan, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China
    • Jinting Zhou, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China
    • Xiaoou Ding, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China
    • Qianqian Qiao, College of Environment and Resources, Jilin University, 130012 Changchun, People’s Republic of China

Source: Environmental Chemistry Letters (Online First™) | 12 May 2010 | 9:45 am CEST

Biofilm-electrode process with high efficiency for degradation of 2,4-dichlorophenol

Abstract  
2,4-Dichlorophenol (2,4-DCP) from chemical industry wastewaters has caused serious environmental pollution. Removal of 2,4-DCP using either physico-chemical or biological methods is not very efficient. In this paper, a combination of biological and electrochemical methods gave satisfactory results. By comparisons of the degradation of 2,4-DCP and the removal of chemical oxygen demand (COD) in electrochemical, biological and biofilm-electrode processes, it was found that the biofilm-electrode process possesses the highest degradation efficiency and removal rate; both the pure electrochemical and the pure biological processes were far less efficient. The removal efficiency of 2,4-DCP using the biofilm-electrode process was 100% in 48 h, while that using the pure electrochemical and the pure biological processes were 62 and 42%, respectively. The experiments show that the current of 5 mA for the cathode of 9 cm2 and the initial concentration 100 mg/l of 2,4-DCP were the optimal parameters of technology for the biofilm-electrode process. The excellent effects are due to the withdrawing electron action of bacterium, electrochemically anodic oxidation and cathodic dechlorination. It is the first time that the biofilm-electrode method was applied in 2,4-DCP degradation. Here, we demonstrated that biofilm-electrode process is a promising method to remove some aromatic compounds in industrial wastewater.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0290-2
  • Authors
    • Xue-Na Zhang, The College of Chemistry, Jilin University, 130012 Changchun, China
    • Wei-Min Huang, The College of Chemistry, Jilin University, 130012 Changchun, China
    • Xuan Wang, The College of Chemistry, Jilin University, 130012 Changchun, China
    • Huiting Li, The College of Chemistry, Jilin University, 130012 Changchun, China
    • Hai-Yan Lu, The College of Chemistry, Jilin University, 130012 Changchun, China
    • Hai-Bo Lin, The College of Chemistry, Jilin University, 130012 Changchun, China

Source: Environmental Chemistry Letters (Online First™) | 7 May 2010 | 10:19 am CEST

Solar Light-Responsive Pt/CdS/TiO2 Photocatalysts for Hydrogen Production and Simultaneous Degradation of Inorganic or Organic Sacrificial Agents in Wastewater

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 27 Apr 2010 | 5:50 pm CEST

Intermediates and Reaction Pathways from the Degradation of Microcystin-LR with Sulfate Radicals

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 23 Apr 2010 | 2:29 pm CEST

Chromate-Induced Activation of Hydrogen Peroxide for Oxidative Degradation of Aqueous Organic Pollutants

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 21 Apr 2010 | 4:50 pm CEST

Evidence of the Differential Biotransformation and Genotoxicity of ZnO and CeO2 Nanoparticles on Soybean (Glycine max) Plants

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 12 Apr 2010 | 7:54 pm CEST

Characterization, dissolution and solubility of synthetic svabite [Ca5(AsO4)3F] at 25–45°C

Abstract  
Svabite is a secondary arsenate mineral, calcium fluoride arsenate [Ca5(AsO4)3F], in the apatite group of phosphates. Its dissolution and subsequent release of aqueous species play an important role in the cycling of arsenic and fluoride in the environment, but the thermodynamic and kinetic properties of svabite dissolution have never been investigated. In the present study, svabite was prepared by precipitation and characterized by various techniques, and then dissolution of synthetic svabite was studied at 25, 35 and 45°C in a series of batch experiments. In addition, the aqueous concentrations from the batch dissolution were used to calculate the solubility product and free energy of formation of svabite. The results of the X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy analyses indicated that the synthetic, microcrystalline svabite with apatite structure used in the experiments has not changed after dissolution. For the dissolution of svabite [Ca5(AsO4)3F] in ultrapure water, F ions were initially found to dissolve preferentially when compared with calcium and arsenate. Preferential dissolution of arsenate when compared with that of calcium was also observed. Dissolution of svabite in aqueous medium appeared to be always non-stoichiometric at the beginning, but when a dissolution equilibrium or steady state was reached at 25 and 35°C, the solid dissolved almost stoichiometrically. The release of calcium, arsenic and fluoride to solution increased with decreasing temperature. The mean K sp value was calculated for Ca5(AsO4)3F of 10−39.21 (10−39.18 ~ 10−39.24) at 25°C; the free energy of formation ΔG f o [Ca5(AsO4)3F] was −5210.46 kJ/mol.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0284-0
  • Authors
    • Yinian Zhu, Guilin University of Technology College of Environmental Science and Engineering Jian-Gan Road 12 Guilin 541004 People’s Republic of China
    • Xuehong Zhang, Guilin University of Technology College of Environmental Science and Engineering Jian-Gan Road 12 Guilin 541004 People’s Republic of China
    • Honghu Zeng, Guilin University of Technology College of Environmental Science and Engineering Jian-Gan Road 12 Guilin 541004 People’s Republic of China
    • Huili Liu, Guilin University of Technology College of Environmental Science and Engineering Jian-Gan Road 12 Guilin 541004 People’s Republic of China
    • Na He, Guilin University of Technology College of Environmental Science and Engineering Jian-Gan Road 12 Guilin 541004 People’s Republic of China
    • Meifang Qian, Guilin University of Technology College of Environmental Science and Engineering Jian-Gan Road 12 Guilin 541004 People’s Republic of China

Source: Environmental Chemistry Letters (Online First™) | 10 Apr 2010 | 9:47 am CEST

Metabolites of the Aquatic Pollutant Diclofenac in Fish Bile

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 9 Apr 2010 | 4:12 pm CEST

Predicting the transportation tendency and potential reservoirs of dioxins by compartment distribution coefficient

Abstract  
We assessed the transportation tendency of dioxins and predict locations at high risk for dioxin pollution. A new parameter, the compartment distribution coefficient DC, was created to account for the tendency of dioxins to preferentially accumulate in particular compartments. It was obtained by a model using levels of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) in four countries: Japan, the United States, the United Kingdom, and Australia. The comparison with the temporal and spatial variation of DC indicated whether the location release or long-range transportation caused the changes. This study showed that PCDD/Fs have the greatest tendency to remain in soil among studied media. A higher DC value in Australia may indicate that this location is a potential future reservoir source of dioxins.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0276-0
  • Authors
    • Yuying Dong, Dalian Nationalities University Department of Environmental Engineering 116600 Dalian Liaoning China
    • Zening Zheng, Dalian Nationalities University Department of Environmental Engineering 116600 Dalian Liaoning China
    • Yingli Zhao, Dalian Nationalities University Department of Environmental Engineering 116600 Dalian Liaoning China
    • Xianliang Qiao, Dalian University of Technology MOE Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental and Biological Science and Technology 116024 Dalian Liaoning China
    • Xuehua Li, Dalian University of Technology MOE Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental and Biological Science and Technology 116024 Dalian Liaoning China

Source: Environmental Chemistry Letters (Online First™) | 6 Apr 2010 | 8:08 pm CEST

A novel procedure for acid-catalysed K2FeO4 oxidation of benzyl alcohol in organic phase

Abstract  
Recent investigations have shown that ferrate(VI) salts oxidize organic compounds in aqueous phases with fast reaction from seconds to minutes and poor selectivity. Few studies have used ferrate(VI) in organic phases. The main issues are the poor solubility of K2FeO4 in common organic solvents and the low reaction rate. Therefore the interests to date are focused on finding a more effective catalyst in the organic oxidation. Up to now no work has been reported on acids as catalysis for the oxidative abilities of K2FeO4 in organic phases. Here we present a novel procedure for oxidizing benzyl alcohol to benzaldehyde without an overoxidation to benzoic acid by K2FeO4 in an organic phase. Using benzyl alcohol as a model, the catalytic activity of various acid solutions was measured. We found that the reactivity of K2FeO4 to the oxidation of benzyl alcohol can be highly enhanced by addition of a small amount of acid solution at room temperature. The catalytic ability of acid solutions follows the order acetic acid < oxalic acid < phosphomolybdic acid < phosphotungstic acid. On the basis of a theoretical analysis, a reaction mechanism is proposed. This method provides a new green way for oxidizing organic substances by K2FeO4 in nonaqueous media.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0283-1
  • Authors
    • Hua Song, Daqing Petroleum Institute Chemistry & Chemical Engineering College 199 Fazhan Rd., High-Tech Zone 163318 Daqing China
    • Zheng Guang Li, Daqing Petroleum Institute Chemistry & Chemical Engineering College 199 Fazhan Rd., High-Tech Zone 163318 Daqing China
    • Bao Hui Wang, Daqing Petroleum Institute Chemistry & Chemical Engineering College 199 Fazhan Rd., High-Tech Zone 163318 Daqing China

Source: Environmental Chemistry Letters (Online First™) | 3 Apr 2010 | 9:15 am CEST

The role of sample preparation in interpretation of trace element concentration variability in moss bioindication studies

Abstract  
Trace element concentrations in plant bioindicators are often determined to assess the quality of the environment. Instrumental methods used for trace element determination require digestion of samples. There are different methods of sample preparation for trace element analysis, and the selection of the best method should be fitted for the purpose of a study. Our hypothesis is that the method of sample preparation is important for interpretation of the results. Here we compare the results of 36 element determinations performed by ICP-MS on ashed and on acid-digested (HNO3, H2O2) samples of two moss species (Hylocomium splendens and Pleurozium schreberi) collected in Alaska and in south-central Poland. We found that dry ashing of the moss samples prior to analysis resulted in considerably lower detection limits of all the elements examined. We also show that this sample preparation technique facilitated the determination of interregional and interspecies differences in the chemistry of trace elements. Compared to the Polish mosses, the Alaskan mosses displayed more positive correlations of the major rock-forming elements with ash content, reflecting those elements’ geogenic origin. Of the two moss species, P. schreberi from both Alaska and Poland was also highlighted by a larger number of positive element pair correlations. The cluster analysis suggests that the more uniform element distribution pattern of the Polish mosses primarily reflects regional air pollution sources. Our study has shown that the method of sample preparation is an important factor in statistical interpretation of the results of trace element determinations.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0282-2
  • Authors
    • Zdzisław M. Migaszewski, Jan Kochanowski University Geochemistry and the Environment Div., Institute of Chemistry 15G Świętokrzyska Str. 25-406 Kielce Poland
    • Paul J. Lamothe, Denver Federal Center U.S. Geological Survey Mail Stop 964D Box 25046 Denver CO 80225 USA
    • James G. Crock, Denver Federal Center U.S. Geological Survey Mail Stop 964D Box 25046 Denver CO 80225 USA
    • Agnieszka Gałuszka, Jan Kochanowski University Geochemistry and the Environment Div., Institute of Chemistry 15G Świętokrzyska Str. 25-406 Kielce Poland
    • Sabina Dołęgowska, Jan Kochanowski University Geochemistry and the Environment Div., Institute of Chemistry 15G Świętokrzyska Str. 25-406 Kielce Poland

Source: Environmental Chemistry Letters (Online First™) | 31 Mar 2010 | 7:01 pm CEST

Element determination in environmental samples using Z-GFAAS with variable magnetic field

Abstract  
Electrothermal atomic absorption spectrometry methods with Zeeman effect background correction (Z-GFAAS) for determination of As, Sb, Se, Ag, Cd, Pb, Cu, Fe, Zn, Cr, and Ni in water and sludge samples were developed. The measurements using Z-GFAAS and variable magnetic field at the three-field dynamic mode permit the sensitivity adaptation for higher analytical concentrations. Calibration ranges were expanded over two orders of magnitude within one measurement run by the applying three-field dynamic mode of this correction system. There are presented calibration data, furnace programs, modifiers, and microwave digestion programs of the obviously monitored elements in the environmental samples. Very low detection limits (3σ criterion) were obtained. Quality assurance was checked by the suitable CRM. The study brings simultaneous determination of the samples with different element concentration range and different sample matrixes, as an important application information for an analyst working in the area of the eco-analytical research.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0281-3
  • Authors
    • Viera Vojteková, University of P. J. Šafárik Institute of Chemical Science, Department of Analytical Chemistry Moyzesova 11 040 01 Košice Slovakia
    • Ján Vojtek, Exclusive Agency of the Analytik Jena in the Slovakia Jánošíkova 1827/65 927 01 Šaľa Slovakia
    • Juraj Bakoš, Podtatranská Water Works Society inc. Hraničná 662/17 058 89 Poprad Slovakia

Source: Environmental Chemistry Letters (Online First™) | 20 Mar 2010 | 12:05 pm CET

A simple and promising route for biodiesel production from low-quality lipids

Abstract  
High production cost is the key issue of biodiesel industry nowadays. To decrease the cost, using low-quality lipids feedstock is the most effective way. For low-quality lipids with high content of free fatty acids, a simple and promising route is proposed to produce biodiesel. Instead of the typical two-step procedure, the esterification and transesterification processes are performed continuously by simultaneously eliminating the formed water in the reaction system with CaO powder. Investigations were carried out on the synthesis of fatty acid methyl ester and fatty acid ethyl ester. The results showed that the esterification rate reached to 99.6% for fatty acid methyl ester and 99.4% for fatty acid ethyl ester within 3–4 h, and the transesterification rate reached to 89.1 and 86.2%, respectively. Over 93 w% of feedstock oil could be transformed to biodiesel. Besides, hydrophobic CaCO3 nanorods were also synthesized as value-added by-product. Based on the new route, the production process of biodiesel could be simplified and the production cost could be reduced.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0280-4
  • Authors
    • Hong Lei, Jilin University College of Chemistry 130012 Changchun China
    • Zichen Wang, Jilin University College of Chemistry 130012 Changchun China
    • Xu Zhao, Jilin University College of Chemistry 130012 Changchun China
    • Xuefeng Ding, Jilin University College of Chemistry 130012 Changchun China
    • Xue Chen, Jilin University College of Chemistry 130012 Changchun China
    • Hongxi Zhang, Jilin University College of Chemistry 130012 Changchun China

Source: Environmental Chemistry Letters (Online First™) | 14 Mar 2010 | 12:27 pm CET

Alteration of male reproductive system in rats fed on red or white meat from tuna fish caught in the Gulf of Gabès in Tunisian coast

Abstract  
Fish, a widely claimed healthy food for humans, could also pose problems to health due to (1) accumulation of pollutants, especially heavy metals, (2) presence of marine toxins such as tetrodotoxin, ciguatoxin or okadaic acid and (3) metabolic production of large amount of uric acid which may crystallize in kidney or in articulations. As tuna fish represents a large part of the traditional food in some countries, the possible impact of its consumption on public health was investigated, with special attention to biochemical and histological alterations related to the genital function. For that purpose, white or red muscle from tuna fish was added for 60 days to the diet of male rats, and attention was paid to biochemical and histological alterations related to the genital function. Feeding rats with white muscle, and much more markedly with red muscle known to be more metabolically active, resulted in (1) an elevated uric acid level in blood, (2) an increase in lead level in testis, (3) an atrophy of the genital tract, including testes, epididymis, prostate and seminal vesicles, (4) a lowering of plasma testosterone level, (5) a decrease in spermatozoids number and motility, (6) an oxidative stress in testes including an increase in lipids peroxidation level and enhanced superoxide-dismutase, catalase and glutathione-peroxidase activities. We conclude that consumption of tuna fish meat, especially the dark one, should be reduced.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0277-z
  • Authors
    • Nesrine Gdoura, Department of Biology, Laboratory of Animal Ecophysiology, Faculty of Sciences, BP 3000, 3018 Sfax, Tunisia
    • Abdelwaheb Abdelmouleh, Laboratory of Marine Biotechnology and Biodiversity, INSTM, Sfax, Tunisia
    • Khansa Chaabouni, Laboratory of Biochemistry and Biophysics, CHU Habib Bourguiba, Sfax, Tunisia
    • Fatma Makni Ayadi, Laboratory of Biochemistry and Biophysics, CHU Habib Bourguiba, Sfax, Tunisia
    • Fadhel Guermazi, Laboratory of Biochemistry and Biophysics, CHU Habib Bourguiba, Sfax, Tunisia
    • Jean-Claude Murat, Laboratory of Cell Biology, Faculty of Medicine, Toulouse, France
    • Abdelfattah Elfeki, Department of Biology, Laboratory of Animal Ecophysiology, Faculty of Sciences, BP 3000, 3018 Sfax, Tunisia

Source: Environmental Chemistry Letters (Online First™) | 11 Mar 2010 | 7:14 pm CET

The effect of application time of mobilising agents on growth and phytoextraction of lead by Brassica napus from a calcareous mine soil

Abstract  Phytoremediation of heavy metal contaminated sites is often limited by the low-bioavailability of the contaminants. Complexing agents can help to improve this technique by enhancing heavy metal solubility. Pot experiments were conducted to determine the best time for the application of ethylene diamine tetraacetic acid (EDTA) and sheep manure extract (SME) for phytoremediation of a contaminated soil by Brassica napus. The plant was grown on a mine calcareous soil treated with increasing concentrations of EDTA or SME 30 and 10 days before sowing (T1 and T2) and 10 and 30 days after sowing (T3 and T4). Soil available Pb and lead concentrations in plant organs of Brassica napus increased with EDTA concentration. The EDTA application before seed germination significantly reduced rapeseed seedling emergence and dry weight. However, the actual amount of phytoextracted Pb by rapeseed did not decrease significantly, due to severe growth depression, at high EDTA concentrations when it had applied at a suitable time (T4). SME application after sowing increased plant dry weight and Pb concentration in the soil solution and enhanced the accumulated metal concentrations in shoots and roots. Comparing the effect of EDTA and SME on Pb phytoextraction, the study showed that SME is not more effective than EDTA. The efficiency of EDTA on Pb phytoextraction by Brassica napus depends on the time of application. The most efficient treatment for Pb phytoextraction by rapeseed was application of 2 g EDTA/kg soil at T4.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0275-1
  • Authors
    • Ali Akbar Safari Sinegani, Bu-Ali Sina University Hamedan Iran
    • Fahime Khalilikhah, Bu-Ali Sina University Hamedan Iran

Source: Environmental Chemistry Letters (Online First™) | 22 Jan 2010 | 3:21 pm CET

Photocatalytic degradation of phenol with mesoporous TiO2−xBx

Abstract  We report a facile approach for preparing mesoporous boron-doped TiO2 materials by combining the sol–gel process with the dehydration of glucose. Specifically a high surface carbon material was formed by dehydration of glucose, then used as template. This material and the TiO2 dry gel were calcinated to produce porous TiO2. The as-synthesized boron-doped TiO2 was in pure anatase crystallite phase with high surface area. X-ray photoelectron spectroscopy (XPS) results showed that boron was incorporated into the anatase TiO2 lattice to form TiO2−xBx. The absorption spectra of TiO2−xBx extended into the visible region to 460 nm. The TiO2−xBx exhibited much higher photocatalytic activity on phenol degradation than pure TiO2. It showed that the phenol degradation by-products of TiO2−xBx were different from that of pure TiO2. Mechanism of the photocatalytic degradation of phenol at TiO2−xBx was also proposed.

  • Content Type Journal Article
  • DOI 10.1007/s10311-010-0274-2
  • Authors
    • Leyan Xiong, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Longzhen Zheng, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Jingpeng Xu, Jiangxi Institute of Analysis and Testing 330029 Nanchang Jiangxi People’s Republic of China
    • Dan Zheng, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Junhua Li, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Xinjia Li, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Juan Sun, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Qiang Liu, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Liling Niu, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Shaoming Yang, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China
    • Jian Xia, East China Jiao Tong University Department of Chemistry and Chemical Engineering 330013 Nanchang Jiangxi People’s Republic of China

Source: Environmental Chemistry Letters (Online First™) | 15 Jan 2010 | 1:43 am CET

Antimutagenic and/or genotoxic effects of processed humic acids as tested upon S. cerevisiae D7

Abstract  Humic acids (HAs) are formed during decomposition of organic matter. Their adsorption, dispersion or emulsification properties attract the interest of medical science and pharmacy. The aim of this work was to study antimutagenic effects of processed HA. Yeast strain Saccharomyces cerevisiae D7 was first used for HA antimutagenicity testing. The highest antimutagenic activity was found in potassium and sodium humates. Humates isolated from lignite pre-treated by HNO3 exhibited slightly lower antimutagenic activity; this effect is caused probably by their higher oxidation degree. Sodium humate processed at 250°C exhibited genotoxic effect, which is probably connected with accelerated formation of reactive oxygen species such as superoxide anion by HA at higher temperature.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0270-6
  • Authors
    • I. Marova, Brno University of Technology Faculty of Chemistry Purkynova 118 612 00 Brno Czech Republic
    • J. Kucerik, Brno University of Technology Faculty of Chemistry Purkynova 118 612 00 Brno Czech Republic
    • K. Duronova, Brno University of Technology Faculty of Chemistry Purkynova 118 612 00 Brno Czech Republic
    • A. Mikulcova, Brno University of Technology Faculty of Chemistry Purkynova 118 612 00 Brno Czech Republic
    • Z. Vlckova, Brno University of Technology Faculty of Chemistry Purkynova 118 612 00 Brno Czech Republic

Source: Environmental Chemistry Letters (Online First™) | 15 Jan 2010 | 1:43 am CET

No evidence for effect of soil compaction on the degradation and impact of isoproturon

Abstract  Soil is damaged by several threats and, among them, chemical contamination by pesticides and compaction. However, the effect of compaction on the fate of pesticides in soil, and the impact of pesticides on soil biological functioning are unknown. Therefore, we studied the effect of soil compaction on the degradation of the herbicide isoproturon, and the impact of this herbicide on an enzyme activity (β-glucosidase) involved in the C soil cycle. Undisturbed soil samples were prepared at different bulk densities, treated with isoproturon then incubated at 18°C in darkness for 63 days. The results showed that soil compaction did not modify significantly the degradation of isoproturon, neither the formation rates nor the nature of its metabolites. Moreover, compaction did not modify the impact of isoproturon on β-glucosidase activity. To our knowledge, these are the first results concerning the interactions between soil compaction and the degradation and impact of a pesticide.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0273-3
  • Authors
    • Laure Mamy, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Pauline Vrignaud, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Nathalie Cheviron, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • François Perreau, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Mehdi Belkacem, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Agathe Brault, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Sébastien Breuil, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Ghislaine Delarue, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Jean-Pierre Pétraud, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Isabelle Touton, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Christian Mougin, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France
    • Véronique Chaplain, INRA, UR 251 PESSAC, Route de Saint Cyr, 78026 Versailles, France

Source: Environmental Chemistry Letters (Online First™) | 11 Jan 2010 | 7:21 pm CET

Synthesis of manganese zinc ferrite using ferrous pickle liquor and pyrolusite ore

Abstract  The possibility of utilizing hydrochloric acid-based waste pickle liquor (WPL) and medium-grade pyrolusite ore to synthesize manganese zinc ferrite was explored. The excess acidity of the WPL was neutralized using mild steel turnings. The unreacted mild steel scrap and suspended solids were removed by filtration. Partial precipitation technique was employed to reduce the impurities. The purified WPL was treated with medium-grade pyrolusite ore to prepare the leach liquor to which the required quantities of ferrous chloride and zinc granules were added to maintain stoichiometry in the resultant compound. The hydroxy carbonate of manganese, zinc and iron was precipitated by the addition of a hot solution (70°C) of sodium carbonate (20% v/v), which upon sintering in argon atmosphere yielded manganese zinc ferrite. The addition of sodium lauryl sulfate (SLS) helped in preventing agglomeration of the particles. Sintering at 450°C for 30 min in argon atmosphere has resulted in mixed phases of (Zn,Mn,Fe) (Fe,Mn)2O4 and Mn3O4, which indicates lack of phase purity. Sintering at temperatures higher than 950°C for 5 h in argon atmosphere enabled complete ferritization. The extent of ferritization was found to be a function of sintering time at 950°C. The manganese zinc ferrites synthesized using WPL and medium-grade pyrolusite ore exhibited soft magnetic characteristics.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0272-4
  • Authors
    • B. R. V. Narasimhan, Madras Centre National Metallurgical Laboratory CSIR Complex, Taramani Chennai 600 113 India
    • Satendra Kumar, Madras Centre National Metallurgical Laboratory CSIR Complex, Taramani Chennai 600 113 India
    • T. S. N. Sankara Narayanan, Madras Centre National Metallurgical Laboratory CSIR Complex, Taramani Chennai 600 113 India

Source: Environmental Chemistry Letters (Online First™) | 8 Jan 2010 | 10:39 pm CET

Study of the biouptake of labeled single-walled carbon nanotubes using fluorescence-based method

Abstract  Single-wall carbon nanotubes (CNT) are one of the most attractive engineered nanomaterials due to their unique electrical, mechanical and thermal properties, and potential use in a variety of commercial products. Due to their small size, CNT could become easily airborne and reach the various environmental compartments and eventually the food chain and humans. However, the environmental fate processes and health impacts of CNT are not clear. This study investigated a method for the quantitative measurement of carbon nanotube (CNT) in natural media such soil and benthic organism tissues. Fluorescence dye Nile blue was used for noncovalent labeling of CNT to enable their fluorescence detection. Labeled nanotubes were successfully detected in soil samples as well as in worm tissue. We were also able to detect the presence of labeled carbon nanotubes in worms exposed for 1 week to CNT-laden soil, which indicates CNT may transfer through environmental food web. The method allows for laboratory measurements of CNT mass transfer and partitioning into various environmental systems.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0271-5
  • Authors
    • Minghui Yang, University of Maryland, Baltimore County Center for Advanced Sensor Technology and Department of Chemical and Biochemical Engineering 5200 Westland blvd. Baltimore MD 21227 USA
    • Seokjoon Kwon, University of Maryland, Baltimore County Department of Civil and Environmental Engineering 5200 Westland blvd. Baltimore MD 21227 USA
    • Yordan Kostov, University of Maryland, Baltimore County Center for Advanced Sensor Technology and Department of Chemical and Biochemical Engineering 5200 Westland blvd. Baltimore MD 21227 USA
    • Avraham Rasooly, FDA Division of Biology, Office of Science and Engineering Silver Spring MD 20993 USA
    • Govind Rao, University of Maryland, Baltimore County Center for Advanced Sensor Technology and Department of Chemical and Biochemical Engineering 5200 Westland blvd. Baltimore MD 21227 USA
    • Upal Ghosh, University of Maryland, Baltimore County Department of Civil and Environmental Engineering 5200 Westland blvd. Baltimore MD 21227 USA

Source: Environmental Chemistry Letters (Online First™) | 7 Jan 2010 | 4:57 pm CET

Degradation of pentachlorophenol in a contaminated soil suspension using hybrid catalysts prepared via urea–formaldehyde polycondensation between iron(III)-tetrakis(p-hydroxyphenyl)porphyrin and humic acid

Abstract  Hybrid catalysts were synthesized by attaching iron(III)-tetrakis(p-hydroxyphenyl)porphyrin (FeTPP(OH)4) to humic acid (HA) via urea–formaldehyde polycondensation. FTIR spectra of the prepared catalysts indicated that the catalysts prepared via urea–formaldehyde polycondensation contained cross-links between the phenolic groups of FeTPP(OH)4 and HA, which contains aliphatic amine functional groups. The prepared catalysts were examined for their ability to catalyze the oxidative degradation of pentachlorophenol (PCP) in a contaminated soil suspension. The levels of PCP degradation and dechlorination for the hybrid catalysts were significantly higher than those for the non-modified catalyst, FeTPP(OH)4.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0269-z
  • Authors
    • Masami Fukushima, Hokkaido University Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering Sapporo 060-8628 Japan
    • Satoko Shigematsu, Hokkaido University Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering Sapporo 060-8628 Japan
    • Seiya Nagao, Kanazawa University Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology Wake, Nomi-shi, Ishikawa 923-1224 Japan

Source: Environmental Chemistry Letters (Online First™) | 5 Jan 2010 | 6:00 pm CET

A preliminary assessment of levels of antifouling booster biocides in harbours and marinas of the island of Gran Canaria, using SPE-HPLC

Abstract  An analytical procedure was developed to allow for the study of the levels of concentration of biocides in the various different ports on the island of Gran Canaria, The Canary Islands. The analytes studied were extracted from water samples using solid-phase extraction and then determined by high-performance liquid chromatography using a diode array detector. The relative standard deviations of the developed procedure were under 12%. Recoveries over 85% and limits of detection between 0.007 and 0.4 μg/L were obtained for all the analytes. The method was applied to the analysis of sea water samples from the ports and marinas on the island of Gran Canaria.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0265-3
  • Authors
    • Álvaro Sánchez Rodríguez, University of Las Palmas de Gran Canaria Department of Chemistry, Faculty of Marine Sciences 35017 Las Palmas de Gran Canaria Spain
    • Zoraida Sosa Ferrera, University of Las Palmas de Gran Canaria Department of Chemistry, Faculty of Marine Sciences 35017 Las Palmas de Gran Canaria Spain
    • José Juan Santana Rodríguez, University of Las Palmas de Gran Canaria Department of Chemistry, Faculty of Marine Sciences 35017 Las Palmas de Gran Canaria Spain

Source: Environmental Chemistry Letters (Online First™) | 28 Dec 2009 | 8:25 pm CET

Hydrophobic calcium carbonate: an option for the value-added conversion of wastes resulting from biodiesel production

Abstract  High production cost is the key issue of biodiesel industry nowadays. To low down the cost, using low-quality lipids feedstock is the most effective way. Two-step process is vastly applied to deal with those low-quality lipids to produce biodiesel. However, environmentally unfriendly wastes are formed during the process. Here we use calcium oxide residue and wastewater from biodiesel production to produce nanostructured calcium carbonate (CaCO3) by carbonation at ambient temperature. The results show that CaCO3 is hydrophobic and has broccoli-like morphology. It is made up of many uniform nano-rods, and each rod is composed of smaller particles with diameters about 50 nm. The idea of wastes utilization could make the biodiesel production process environmentally friendly, and the income of the produced CaCO3 could further low down the cost of biodiesel production.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0267-1
  • Authors
    • Hong Lei, Jilin University College of Chemistry Qianjin Street 2699 130012 Changchun China
    • Xue Chen, Jilin University College of Chemistry Qianjin Street 2699 130012 Changchun China
    • Shuang Guan, Jilin University College of Chemistry Qianjin Street 2699 130012 Changchun China
    • Yang Liu, Jilin University College of Chemistry Qianjin Street 2699 130012 Changchun China
    • Xuefeng Ding, Jilin University College of Chemistry Qianjin Street 2699 130012 Changchun China
    • Zichen Wang, Jilin University College of Chemistry Qianjin Street 2699 130012 Changchun China

Source: Environmental Chemistry Letters (Online First™) | 28 Dec 2009 | 8:25 pm CET

Influence of americium-241 on the microbial population and biodegradation of organic waste

Abstract  The present study investigated the influence of 241Am on microbial growth and the degradation of organic waste. Leachate samples collected in a lysimeter were periodically analyzed for bacterial growth, under both aerobic and anaerobic conditions. 241Am inhibited bacterial growth, and the degradation of organic matter was delayed in comparison with the control. Minimal inhibitory concentration assays and survival curves revealed that it inhibits the growth of Pseudomonas putida F1. The assay also revealed that 241Am is more toxic than 238U, Zn2+ and Cd2+. This study further led to the finding of four new radionuclide-tolerant bacterial strains: Flavobacterium spp., Pseudomonas gladioli, Chryseobacterium indologenes and Ochrobactrum anthropi. The survival curves of P. gladioli, C. indologenes revealed that these bacteria are resistant to metal as consortia.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0266-2
  • Authors
    • Rafael Vicente de Pádua Ferreira, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil
    • Solange Kazumi Sakata, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil
    • Vera Lúcia Keiko Isiki, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil
    • Hissae Miyamoto, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil
    • Maria Helena Bellini, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil
    • Luis Filipe C. P. de Lima, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil
    • Júlio Takehiro Marumo, Nuclear and Energy Research Institute—IPEN – CNEN/SP Waste Management Laboratory Av Professor Lineu Prestes, 2242 Cidade Universitária, São Paulo SP 05508-000 Brazil

Source: Environmental Chemistry Letters (Online First™) | 28 Dec 2009 | 8:25 pm CET

The formation of a new horseradish peroxidase binding rare earth

Abstract  The charge distribution, the isolation, purification, and characterization of horseradish peroxidase (HRP) were investigated. A new HRP protein binding La (La-HRP) was found for the first time in vivo. The molecular weight of the La-HRP protein is about 43,833 Da. The activity index (Rz) of the La-HRP protein (Rz = 2.4) is lower than that of HRP (Rz = 3.1). The La-HRP protein is absorbed in the plasma membrane of the plant and animal, leading to the change in the function of the cell membrane. Therefore, the La-HRP protein is harmful to living organisms.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0262-6
  • Authors
    • Na Jiang, Nanjing Normal University Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science 210097 Nanjing People’s Republic of China
    • Lihong Wang, Nanjing Normal University Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science 210097 Nanjing People’s Republic of China
    • Chunlei Du, Nanjing Normal University Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science 210097 Nanjing People’s Republic of China
    • Xiaolan Ding, Tsinghua University State Key Laboratory of Biomembrane and Membrane Biotechnology, Department of Biological Science and Biotechnology 100084 Beijing People’s Republic of China
    • Xiaohua Huang, Nanjing Normal University Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science 210097 Nanjing People’s Republic of China

Source: Environmental Chemistry Letters (Online First™) | 18 Dec 2009 | 5:42 pm CET

Radiocarbon in food: a non-problem of health effects

Abstract  Recently it has come to our attention that a paper was published in this journal entitled “recycling greenhouse gas fossil fuel emissions into low radiocarbon food products to reduce human genetic damage” (Williams in Environ Chem Lett 5:197–202, 2007). In this article, it is argued that food grown in a greenhouse is healthier for people, when the greenhouse is fertilised with CO2 prepared from fossil fuels. In this comment, however, we argue that the effect on human health is completely negligible.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0264-4
  • Authors
    • J. van der Plicht, Groningen University Center for Isotope Research Groningen The Netherlands
    • J. P. M. Beijers, Groningen University Kernfysisch Versneller Instituut Groningen The Netherlands

Source: Environmental Chemistry Letters (Online First™) | 15 Dec 2009 | 7:50 am CET

Role of Rh promoter on increasing stability of Au/Al2O3 catalyst for CO oxidation at low temperature

Abstract  The Au/Al2O3 and Au–Rh/Al2O3 catalysts were prepared by deposition–precipitation. The promotional effect of Rh on the performance of the Au/Al2O3 catalyst for CO oxidation was studied. The results indicate that using Au/Al2O3 catalyst, CO can be completely oxidized at 0°C or much lower temperature but the catalyst deactivated very fast. Rh can improve the stability of Au/Al2O3 catalyst more than 10 times, which gives an important hint to develop high stable catalyst for CO oxidation at low temperature.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0261-7
  • Authors
    • Xiaohong Wang, East China University of Science and Technology Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis Shanghai China
    • Guanzhong Lu, East China University of Science and Technology Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis Shanghai China
    • Yun Guo, East China University of Science and Technology Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis Shanghai China
    • Zhigang Zhang, East China University of Science and Technology Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis Shanghai China
    • Yanglong Guo, East China University of Science and Technology Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis Shanghai China

Source: Environmental Chemistry Letters (Online First™) | 12 Dec 2009 | 3:18 pm CET

Human bioaccessibility of Cr, Cu, Ni, Pb and Zn in urban soils from the city of Torino, Italy

Abstract  Several physiologically based extraction procedures have been proposed to estimate the fraction of the potentially toxic element content that would be bioaccessible in the human gastro-intestinal tract following accidental ingestion of soil. Many of these procedures are complex, they have been applied to a very limited range of soils, and most work has focussed on arsenic and lead. In the present study, a simplified, two-stage extraction, simulating the human stomach and intestine, was developed and applied to urban soil samples from ten public-access areas in the City of Torino, Italy. The human oral bioaccessibility of chromium, copper, nickel, lead and zinc was estimated. Lead and zinc bioaccessibilities were found to be higher in the stomach, but chromium was more bioaccessible in the intestine. Analyte concentrations were higher in roadside soils than in soils from parks. A higher proportion of the soil metal content was found in bioaccessible forms at roadsides than in parks. Comparison of the current findings with results of earlier work involving sequential extraction of the same soils indicated that the sequential procedure gave a relative, but not an absolute, indication of bioaccessibility. Calculations based on the bioaccessible analyte concentrations suggest that ingestion of only 2–3 g of some of the roadside soil samples from Torino could deliver the tolerable daily oral intake of chromium, nickel and lead to a 20-kg child. The developed procedure is useful for preliminary screening of soils and prediction of whether their bioaccessible metal contents are likely to pose a risk to human health.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0263-5
  • Authors
    • Julien Sialelli, University of Strathclyde WestCHEM, Department of Pure and Applied Chemistry 295 Cathedral Street Glasgow G1 1XL UK
    • Christine M. Davidson, University of Strathclyde WestCHEM, Department of Pure and Applied Chemistry 295 Cathedral Street Glasgow G1 1XL UK
    • Andrew S. Hursthouse, University of the West of Scotland School of Engineering and Science High Street Paisley PA1 2BE UK
    • Franco Ajmone-Marsan, Università di Torino DI.VA.P.R.A., Chimica Agraria Via Leonardo da Vinci, 44 10095 Grugliasco Torino Italy

Source: Environmental Chemistry Letters (Online First™) | 12 Dec 2009 | 3:18 pm CET

Preparation of amphiphilic composite and removal of oil and hexavalent chromium from wastewater

Abstract  A new composite for water treatment was prepared by melt blend for oil and hexavalent chromium absorption. Ethylene Propylene Diene Monomer (EPDM) was the matrix, calcinatory Fe2O3 and anion-exchange resin 201×7 were the fillers. This composite can suspend in water–oil contact (WOC) and absorb oils and hexavalent chromium in wastewater simultaneously. The absorbencies of composites changed greatly with various ratios of calcinatory Fe2O3 and anion-exchange resin 201×7. The results showed that the oil absorbencies increased continuously and hexavalent chromium absorbencies were step-down as calcinatory Fe2O3 loadings from 13 to 19%. The composite can adsorb oils and hexavalent chromium simultaneously. The optimized proportion of calcinatory Fe2O3 and anion-exchange resin 201×7 in composite was found when the absorbencies of oils and hexavalent chromium reaching the maximum simultaneously. This composite is an inexpensive, convenient and high efficiency material for removing oils and hexavalent chromium from wastewater.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0256-4
  • Authors
    • X. Q. Liu, Jilin Agricultural University College of Food Science and Engineering 130118 Changchun China
    • G. Zhang, Jilin University Key Laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering 130012 Changchun China
    • H. Q. Xing, Jilin University College of Quartermaster Technology 130062 Changchun China
    • P. Huang, Jilin University Key Laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering 130012 Changchun China
    • X. L. Zhang, Jilin University Key Laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering 130012 Changchun China

Source: Environmental Chemistry Letters (Online First™) | 26 Nov 2009 | 9:00 am CET

Biosorption of zinc ions from aqueous solution by the microalga Scenedesmus obliquus

Abstract  Aquatic environments are often exposed to toxic heavy metals, which gain access to the food chain via microalgae and may cause severe problems at higher trophic levels. However, such a metabolic specificity can be taken advantage of in bioremediation strategies. The potential of a novel wild strain of Scenedesmus obliquus, previously isolated from a heavy metal-contaminated site in northern Portugal, to remove Zn from aqueous solutions was thus studied, using several initial concentrations. The removal extent reached its maximum by 1 day: 836.5 mg Zn/g biomass, at the initial concentration of 75 mg/L, mainly by adsorption onto the cell surface. Comparative studies encompassing a commercially available strain of the same microalgal species led to a maximum removal extent of only 429.6 mg Zn/g biomass, under identical conditions. Heat-inactivated cells permitted a maximum removal of 209.6 mg Zn/g biomass, at an initial concentration of 50 mg Zn/L. The maximum adsorption capacity of Zn, estimated via Langmuir’s isotherm, was 330 mg Zn/g biomass. Finally, Zn removal was highest at pH 6.0–7.0. It was proven, for the first time, that such a wild microalga can uptake and adsorb Zn very efficiently, which unfolds a particularly good potential for bioremediation. Its performance is far better than similar (reference) species, especially near neutrality, and even following heat-treatment.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0258-2
  • Authors
    • Cristina M. Monteiro, Universidade Católica Portuguesa CBQF/Escola Superior de Biotecnologia Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal
    • Paula M. L. Castro, Universidade Católica Portuguesa CBQF/Escola Superior de Biotecnologia Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal
    • F. Xavier Malcata, Universidade Católica Portuguesa CBQF/Escola Superior de Biotecnologia Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal

Source: Environmental Chemistry Letters (Online First™) | 24 Nov 2009 | 8:10 am CET

Investigation of bioremediation potential of zymogenous bacteria and fungi for crude oil degradation

Abstract  Bioremediation potential of bacteria and fungi isolated from sludge samples has been investigated (Danube alluvium, Pančevo, Serbia). Total isolated microorganisms were divided into three parts. One part was added with actidione antifungicide. The second part was added with streptomycin antibiotic. The third part was without additives. Paraffinic type of crude oil was a substrate for assessment of bioremediation potential. The simulated oil biodegradation lasted 30, 60 and 90 days. Parallel with that, the experiments with blind trial were conducted. Extracts were isolated from the samples with chloroform in a separate funnel. They were assayed for the group composition (alkanes, aromatics, alcohols and fatty acids) by column chromatography. Alkane fraction was analysed by gas chromatography—mass spectrometry (GC–MS). The most intense oil degradation was achieved in the experiments with bacteria, somewhat weaker with consortium of fungi and bacteria, and the weakest bioremediation potential in these experiments was shown by fungi.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0257-3
  • Authors
    • Mila Ilić, IChTM Center of Chemistry Studentski trg 12-16 11001 Belgrade Serbia
    • Mališa Antić, IChTM Center of Chemistry Studentski trg 12-16 11001 Belgrade Serbia
    • Vesna Antić, IChTM Center of Chemistry Studentski trg 12-16 11001 Belgrade Serbia
    • Jan Schwarzbauer, Aachen University Institute of Geology and Geochemistry of Petroleum and Coal Lochenerstrasse 4-20 52056 Aachen Germany
    • Miroslav Vrvić, University of Belgrade Faculty of Chemistry Studentski trg 12-16 11001 Belgrade Serbia
    • Branimir Jovančićević, University of Belgrade Faculty of Chemistry Studentski trg 12-16 11001 Belgrade Serbia

Source: Environmental Chemistry Letters (Online First™) | 24 Nov 2009 | 8:10 am CET

Imprinted polymer particles for preconcentration of copper from water and biological samples

Abstract  Imprinted polymer particles have been developed as a novel adsorbent for the adsorption of copper from aqueous solution. This method has received much attention in various fields because of their high selectivity for template molecules. In this work, separation of copper from water and biological samples by batch solid phase extraction based on molecular imprinting technique is presented. Copper-imprinted polymer was prepared by free radical solution polymerization in a glass tube containing CuSO4, morin, 4-vinylpyridine as a functional monomer, ethyleneglycoldimethacrylate as a cross-linking monomer, 2,2′- azobisisobutyronitrile as an initiator. The polymer block obtained was ground and sieved, and the Cu-morin complex was removed from polymer particles. The synthesized polymer particles both prior to and after leaching have been characterized by IR and X-ray diffraction studies. The effect of different parameters, such as pH, adsorption and desorption time, type and least amount of the eluent for elution of the complex from polymer were evaluated. The limit of detection of the proposed method was 0.12 μg L−1. The method was applied to the recovery and determination of copper in water and biological real samples.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0260-8
  • Authors
    • Mostafa Khajeh, University of Zabol Department of Chemistry P.O. Box 98615-538 Zabol Iran
    • Esmael Sanchooli, University of Zabol Department of Chemistry P.O. Box 98615-538 Zabol Iran

Source: Environmental Chemistry Letters (Online First™) | 21 Nov 2009 | 10:09 am CET

Persistence of gemfibrozil, naproxen and mefenamic acid in natural waters

Abstract  The occurrence of pharmaceuticals in natural waters is a potential threat to human nutrition and ecosystem quality. The persistence of the acidic pharmaceuticals gemfibrozil, naproxen and mefenamic acid was studied in surface waters of Maracaibo Lake and Tule reservoir (Venezuela) under laboratory conditions. A quick and easy analytical method was developed for the determination of the acidic drugs at microgram per liter levels using aqueous derivatization, liquid–liquid extraction and gas chromatography–mass spectrometry. Pharmaceuticals degradation followed a pseudo first-order kinetic and their half-lives were calculated for every experimental condition. Under sunlight, naproxen and mefenamic acid were degraded at moderate rates with half-lives from 9.6 ± 0.5 to 27.0 ± 6.6 days, while gemfibrozil had a higher persistence (t 1/2 = 119.5 ± 15.6 − 288.8 ± 61.3 days).

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0239-5
  • Authors
    • Lilia Araujo, University of Zulia Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering PO Box 4011-A-526 Maracaibo Venezuela
    • Noreiva Villa, University of Zulia Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering PO Box 4011-A-526 Maracaibo Venezuela
    • Nuris Camargo, University of Zulia Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering PO Box 4011-A-526 Maracaibo Venezuela
    • Maikellys Bustos, University of Zulia Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering PO Box 4011-A-526 Maracaibo Venezuela
    • Theobaldo García, University of Zulia Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering PO Box 4011-A-526 Maracaibo Venezuela
    • Avismelsi de Jesus Prieto, University of Zulia Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering PO Box 4011-A-526 Maracaibo Venezuela

Source: Environmental Chemistry Letters (Online First™) | 19 Nov 2009 | 9:01 pm CET

Thermodynamics of chromium(III) adsorption onto a cation exchanger derived from saw dust of Jack wood

Abstract  A novel cation exchanger, polymethacrylic acid-grafted saw dust (SD) with spacer group (SP) containing carboxylate functional group at the chain end (SDGPMA-SP-COOH) was prepared from saw dust of Jack wood, and its adsorption equilibrium and thermodynamics of Cr(III) ions were studied at different initial concentrations and temperatures at pH 7.0 using batch technique. Thermodynamic parameters such as change in standard free energy, ΔG 0, standard enthalpy, ΔH 0 and standard entropy, ΔS 0 were determined. The values of isosteric heat of adsorption (ΔH x ) remain constant at different surface loading of Cr(III) indicating homogeneous surface sites and the absence of lateral interaction between adsorbed ions.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0255-5
  • Authors
    • T. S. Anirudhan, University of Kerala Department of Chemistry Kariavattom Trivandrum 695 581 India
    • P. G. Radhakrishnan, University of Kerala Department of Chemistry Kariavattom Trivandrum 695 581 India

Source: Environmental Chemistry Letters (Online First™) | 18 Nov 2009 | 8:15 pm CET

Synthesis of substituted diphenylamines and carbazoles: phototransformation products of diclofenac

Abstract  The formation of stable and potentially hazardous compounds as a result of photochemical transformation of pharmaceutical substances in the aquatic environment implies a demand for standard compounds within environmental analysis. The major phototransformation products of diclofenac are comprised of substituted diphenylamines and carbazoles. Substituted diphenylamines were synthesized by Ullmann condensation reactions between anilines and halobenzenes. Monochlorocarbazoles were obtained from palladium-catalyzed intramolecular coupling reactions of monochlorinated diphenylamines, photocyclization of dichlorinated diphenylamines or by direct chlorination of carbazole. The availability of synthetic photoproducts of diclofenac is of critical importance for further studies on the environmental fate as well as the ecotoxicological effects of the drug in the environment.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0259-1
  • Authors
    • Jesper Svanfelt, Åbo Akademi University Laboratory of Organic Chemistry Biskopsgatan 8 20500 Turku Finland
    • Leif Kronberg, Åbo Akademi University Laboratory of Organic Chemistry Biskopsgatan 8 20500 Turku Finland

Source: Environmental Chemistry Letters (Online First™) | 18 Nov 2009 | 12:49 am CET

Determination trace amounts of copper, nickel, cobalt and manganese ions in water samples after simultaneous separation and preconcentration

Abstract  In the present article, a simple, rapid, sensitive and economical method has been developed for the simultaneous separation and preconcentration of the trace amounts of copper, nickel, cobalt and manganese in water samples by using modified XAD-4 resins. The sorption was quantitative in the pH range 6.0–9.0, whereas quantitative desorption occurred instantaneously with 5.0 mL of 2 M HNO3, and selected elements have been determined by using flame atomic absorption spectrometry. Dynamic ranges were 0.04–3.5, 0.1–6.0, 0.04–4.5 and 0.04–4.0 μg/mL for copper, nickel, cobalt and manganese, respectively. The detection limits were 9.2, 28.6, 12.3 and 5.7 ng/mL for Cu(II), Ni(II), Co(II) and Mn(II), respectively. The effects of the experimental parameters, including the sample pH, eluent type, interference ions and breakthrough volume, were studied for separation and preconcentration of Cu(II), Ni(II), Co(II) and Mn(II) ions. Determination of these ions in standard samples confirmed that the proposed method has good accuracy. The proposed method was used for the determination of these ions in water samples.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0254-6
  • Authors
    • Daryoush Afzali, International Center for Science, High Technology and Environmental Sciences Environment Department, Research Institute of Environmental Sciences Kerman Iran
    • Sayez Zia Mohammadi, Payame Noor University Department of Chemistry Bam Iran

Source: Environmental Chemistry Letters (Online First™) | 5 Nov 2009 | 7:57 pm CET

Occurrence of pharmaceuticals and hormones in drinking water treated from surface waters

Abstract  The levels of a wide variety of pharmaceuticals and hormones, in source and potable-water supplies of French drinking water treatment plants, were assessed. In surface waters, 27 of the 51 target compounds were determined at least once. Paracetamol, salicylic acid and carbamazepine were quantified in more than 80% of samples. The highest concentration of 71 ng/L was observed for paracetamol. Twelve other substances were widely found in the surface waters studied, contaminating between 33 and 80% of the samples. These compounds include analgesics, psychotropic drugs, antibiotics and beta-blockers consistent with the French consumption, as well as natural hormones (oestrone, progesterone and androgens) and synthetic progestatives. In drinking water supplies, 25 compounds were also present, salicylic acid being the most frequently detected. Carbamazepine and the β-blocker atenolol found at lower levels (maximum 2 ng/L), are also present in more than 30% of the contaminated drinking waters. The pharmaceuticals exhibit different reactivity towards the treatments, while progestagens and androgens seem resistant to most of them. The effectiveness of the treatments is discussed, as well as the consequences of the presence of all these compounds on human health. This is the first time that such a long list of compounds (51) is proposed to assessment, and consequently this study provides the first data on pharmaceuticals and steroids occurrences in French drinking waters and represents a basis for the assessment of risks for humans. Moreover, at the international level, this is the first time that so many substances are quantified in drinking water, due to the very low detection limits, especially in the case of the hormones.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0253-7
  • Authors
    • Emmanuelle Vulliet, Service Central d’Analyse du CNRS - USR59 Chemin du Canal 69360 Solaize France
    • Cécile Cren-Olivé, Service Central d’Analyse du CNRS - USR59 Chemin du Canal 69360 Solaize France
    • Marie-Florence Grenier-Loustalot, Service Central d’Analyse du CNRS - USR59 Chemin du Canal 69360 Solaize France

Source: Environmental Chemistry Letters (Online First™) | 27 Oct 2009 | 7:00 pm CET

A quantitative structure–retention relationship study for prediction of chromatographic relative retention time of chlorinated monoterpenes

Abstract  A novel quantitative structure–retention relationship model has been developed for the gas chromatographic relative retention times (t R) of 67 polychlorinated monoterpene congeners in a non-polar column. Modeling of the relative retention time of these compounds as a function of the theoretically derived descriptors was established by principal component and partial least squares regressions. The choice of optimal training sets is efficiently performed by Kohonen self-organizing map. The genetic algorithm was used for the selection of the variables resulted in the best-fitted models. Appropriate models with low standard errors and high correlation coefficients were obtained. Wiener index, Balaban index, and ideal gas thermal capacity are examples of the descriptors affected by the retention times of polychlorinated monoterpenes.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0251-9
  • Authors
    • Jahan B. Ghasemi, K.N. Toosi University of Technology Chemistry Department, Faculty of Sciences Tehran Iran
    • Sh. Ahmadi, Razi University Chemistry Department, Faculty of Science Kermanshah Iran
    • S. D. Brown, University of Delaware Chemistry and Biochemistry Department Newark DE 19716 USA

Source: Environmental Chemistry Letters (Online First™) | 27 Oct 2009 | 7:00 pm CET

Photoelectrocatalytic degradation of camphor on TiO2/RuO2 electrodes

Abstract  The degradation of camphor using titanium/ruthenium dioxide (TiO2/RuO2; 70:30) electrodes was investigated in a photoelectrochemical thin-film reactor under near UV light irradiation. Two different electrolytes (Na2SO4 and NaCl) were used in this work. Camphor degradation was monitored by solvent extraction methods and gas chromatography (GC) analysis. Comparative studies between photoelectrochemical, electrochemical, photolytic, and heterogeneous photocatalytical process were carried out. When NaCl was used, the degradation efficiency of camphor was improved, probably on account of electrochemical generation of active chlorine species and their photochemical conversion to chlorine radicals. Under these conditions camphor was completely mineralized at reaction times of 30 min.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0252-8
  • Authors
    • Adriane Martins de Freitas, Universidade Federal do Paraná Departamento de Química PO Box 19081 81531-990 Curitiba PR Brazil
    • Carla Sirtori, Universidade Federal do Paraná Departamento de Química PO Box 19081 81531-990 Curitiba PR Brazil
    • Patricio Peralta-Zamora, Universidade Federal do Paraná Departamento de Química PO Box 19081 81531-990 Curitiba PR Brazil

Source: Environmental Chemistry Letters (Online First™) | 27 Oct 2009 | 7:00 pm CET

Application of Zn-contaminated soil: Feasibility study on the removal of H2S from hot coal-derived gas

Abstract  In this study, zinc-contaminated soils were chosen as a candidate material for the removal of hydrogen sulfide (H2S) from hot coal-derived gas. Laboratory experiments showed that H2S was decreased to less than 10 ppm when the zinc-contaminated soils were reacted with H2S. The best removal temperature of H2S was found to be at 550°C in the operating conditions. In addition to zinc species, free iron oxides in contaminated soils also performed an active species to react with H2S and enhanced the sulfur capacity. Through the XPS analysis, iron sulfide (FeS) and zinc sulfide (ZnS) were the major products after removal experiments. Regeneration experimental results indicated that the zinc-contaminated soils can be regenerated by pass diluted air and thus be reused on the removal of H2S for many times.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0249-3
  • Authors
    • Tzu-Hsing Ko, Kao Fong College of Digital Contents Department of Leisure and Recreation Management 38, Hsin-Hsing Road Chang-Ji Hsiang, Pingtung County Taiwan

Source: Environmental Chemistry Letters (Online First™) | 27 Oct 2009 | 7:00 pm CET

Voltammetric determination of the herbicide Bifenox in drinking and river water using a silver solid amalgam electrode

Abstract  A new method for the determination of submicromolar and nanomolar concentrations of herbicide Bifenox using differential pulse voltammetry at a mercury meniscus modified silver solid amalgam electrode is described. This new type of working electrode is non-toxic, environmentally friendly, and compatible with principles of green analytical chemistry, and its surface can be easily electrochemically renewed in the case of passivation. The newly developed direct differential pulse voltammetric determination of Bifenox gives limit of determination 6.7·10−7 and 6.9·10−7 M in drinking and river water, respectively. Both the selectivity and the sensitivity can be further increased by preliminary separation and preconcentration using solid phase extraction. This combination enables to reach limit of determination 0.9 × 10−9 and 1.5 × 10−9 M for drinking and river water, respectively. Because of lower running and investment costs, this electroanalytical method can be used for large scale monitoring of possible water contamination with tested herbicide.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0250-x
  • Authors
    • Jiří Barek, Charles University in Prague Department of Analytical Chemistry, Faculty of Science, UNESCO Laboratory of Environmental Electrochemistry Albertov 6 CZ-128 43 Prague 2 Czech Republic
    • Dana Cabalková, Charles University in Prague Department of Analytical Chemistry, Faculty of Science, UNESCO Laboratory of Environmental Electrochemistry Albertov 6 CZ-128 43 Prague 2 Czech Republic
    • Jan Fischer, Charles University in Prague Department of Analytical Chemistry, Faculty of Science, UNESCO Laboratory of Environmental Electrochemistry Albertov 6 CZ-128 43 Prague 2 Czech Republic
    • Tomáš Navrátil, J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i. Dolejškova 3 182 23 Prague 8 Czech Republic
    • Karolina Pecková, Charles University in Prague Department of Analytical Chemistry, Faculty of Science, UNESCO Laboratory of Environmental Electrochemistry Albertov 6 CZ-128 43 Prague 2 Czech Republic
    • Bogdan Yosypchuk, J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i. Dolejškova 3 182 23 Prague 8 Czech Republic

Source: Environmental Chemistry Letters (Online First™) | 27 Oct 2009 | 7:00 pm CET

Performance of struvite precipitation during pretreatment of raw landfill leachate and its biological validation

Abstract  Treatment of landfill leachate is a worldwide problem at present. A pretreatment process, struvite MgNH4PO4·6H2O precipitation, was developed to treat raw landfill leachate, and its performance was biologically validated in this manuscript. During the struvite precipitation, the suitable operating pH was 9 with 97.8% NH4 +-N removal. It was found that temperature had no significant effect on the treatment efficiency of struvite precipitation, but clearly affected COD removal and BOD/COD ratio. At 40°C, NH4 +-N removal, COD removal and BOD/COD ratio were above 95, 56 and 0.70%, respectively. The X-ray diffraction analysis verified that the precipitate formed mainly was struvite and other compounds of phosphor may be formed accompanying the struvite production. In membrane bioreactor system, the average MLVSS/MLSS ratio of 0.55 characterized the operation at 24 h HRT had a surge to 0.69 during HRT of 12 h. These indicated that the struvite-pretreated leachate could provide benefits.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0248-4
  • Authors
    • Li Xiu-Fen, Jiangnan University Lab of Environmental Biotechnology, School of Environmental and Civil Engineering Lihu Road 1800 214122 Wuxi City Jiangsu China
    • Dolores Barnes, Jiangnan University Lab of Environmental Biotechnology, School of Environmental and Civil Engineering Lihu Road 1800 214122 Wuxi City Jiangsu China
    • Chen Jian, Jiangnan University Lab of Environmental Biotechnology, School of Environmental and Civil Engineering Lihu Road 1800 214122 Wuxi City Jiangsu China

Source: Environmental Chemistry Letters (Online First™) | 22 Oct 2009 | 8:56 pm CEST

Cd2+ adsorption on alkaline-pretreated diatomaceous earth: equilibrium and thermodynamic studies

Abstract  Naturally occurring diatomaceous earth was modified by alkaline pretreatment, and its effectiveness for Cd2+ removal from contaminated water was investigated. Batch experiments were carried out to determine Cd2+ adsorption capacity and the efficiency of the sorption process under different experimental conditions. Experimental data showed good fitting to Langmuir and Freundlich isotherms models. The Cd2+ maximum adsorption capacity was 0.058 mmol g−1 for raw diatomite and increased to 0.195 mmol g−1 for alkaline-pretreated diatomite with efficiency higher than 96% (diatomite dose 2.5 g L−1, pH 6). Adsorption of Cd2+ to alkaline-pretreated diatomite increased as the temperature increased. Thermodynamic parameters were calculated to evaluate the feasibility of the adsorption process at different temperatures. The adsorption process was spontaneous and endothermic. The interaction between Cd2+ ions and diatomite surface was weak enough to be considered as physical sorption, confirmed by the low value of activation energy.

  • Content Type Journal Article
  • DOI 10.1007/s10311-009-0246-6
  • Authors
    • Patricia Miretzky, Universidad Nacional Autónoma de México Centro de Geociencias Campus Juriquilla, Boulevard Juriquilla 3001 76230 Queretaro Mexico
    • Carolina Muñoz, Universidad Nacional Autónoma de México Centro de Geociencias Campus Juriquilla, Boulevard Juriquilla 3001 76230 Queretaro Mexico
    • Enrique Cantoral-Uriza, Universidad Nacional Autónoma de México Facultad de Ciencias, Unidad multidisciplinaria de docencia e investigación Campus Juriquilla, Boulevard Juriquilla 3001 76230 Querétaro México

Source: Environmental Chemistry Letters (Online First™) | 20 Oct 2009 | 5:12 pm CEST

Method Development and Measurement of Perfluorinated Compounds in U.S. Chicken Eggs

Environmental Science & Technology, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable).

Source: Environmental Science & Technology: Latest Articles (ACS Publications) | 23 Jul 2008 | 6:00 am CEST




 


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