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Applications of Polyparameter Linear Free Energy Relationships in Environmental Chemistry

17-10-2014 | Satoshi Endo; Kai-Uwe Goss, Environmental Science & Technology, 2014

Partitioning behavior of organic chemicals has tremendous influences on their environmental distribution, reaction rates, bioaccumulation, and toxic effects. Polyparameter linear free energy relationships (PP-LFERs) have been proven to be useful to characterize the equilibrium partitioning of ...

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Warming Influences Mg2+ Content, While Warming and Acidification Influence Calcification and Test Strength of a Sea Urchin

17-10-2014 | Maria Byrne; Abigail M. Smith; Samantha West; Marie Collard; Philippe Dubois; Alexia Graba-landry; Symon A Dworjanyn, Environmental Science & Technology, 2014

We examined the long-term effects of near-future changes in temperature and acidification on skeletal mineralogy, thickness, and strength in the sea urchin Tripneustes gratilla reared in all combinations of three pH (pH 8.1, 7.8, 7.6) and three temperatures (22 °C, 25 °C, 28 °C) from the early ...

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Nitrite Reduction Mechanism on a Pd Surface

17-10-2014 | Hyeyoung Shin; Sungyoon Jung; Sungjun Bae; Woojin Lee; Hyungjun Kim, Environmental Science & Technology, 2014

Nitrate (NO3–) is one of the most harmful contaminants in the groundwater, and it causes various health problems. Bimetallic catalysts, usually palladium (Pd) coupled with secondary metallic catalyst, are found to properly treat nitrate-containing wastewaters; however, the selectivity toward N2 ...

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Influence of Extracellular Polymeric Substances on the Long-Term Fate, Dissolution, and Speciation of Copper-Based Nanoparticles

17-10-2014 | Adeyemi S. Adeleye; Jon R. Conway; Thomas Perez; Paige Rutten; Arturo A. Keller, Environmental Science & Technology, 2014

The influence of phytoplankton-derived soluble extracellular polymeric substances (EPS), pH, and ionic strength (IS) on the dissolution, speciation, and stability of nano-CuO, nano-Cu, and Kocide (a micron sized Cu(OH)2-based fungicide) was investigated over 90 days. EPS improved the stability of ...

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Identification of Unknown Microcontaminants in Dutch River Water by Liquid Chromatography-High Resolution Mass Spectrometry and Nuclear Magnetic Resonance Spectroscopy

17-10-2014 | J.A. van Leerdam; J. Vervoort; G. Stroomberg; P. de Voogt, Environmental Science & Technology, 2014

In the past decade during automated surface water monitoring in the river Meuse at border station Eijsden in The Netherlands, a set of unknown compounds were repeatedly detected by online liquid chromatography-diode-array detection in a relatively high signal intensity. Because of the unknown ...

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Cost-Benefit Analysis of the Swiss National Policy on Reducing Micropollutants in Treated Wastewater

17-10-2014 | Ivana Logar; Roy Brouwer; Max Maurer; Christoph Ort, Environmental Science & Technology, 2014

Contamination of freshwater with micropollutants (MPs) is a growing concern worldwide. Even at very low concentrations, MPs can have adverse effects on aquatic ecosystems and possibly also on human health. Switzerland is one of the first countries to start implementing a national policy to reduce ...

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Driving Force Analysis of the Agricultural Water Footprint in China Based on the LMDI Method

17-10-2014 | Chunfu Zhao; Bin Chen, Environmental Science & Technology, 2014

China’s water scarcity problems have become more severe because of the unprecedented economic development and population explosion. Considering agriculture’s large share of water consumption, obtaining a clear understanding of Chinese agricultural consumptive water use plays a key role in ...

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Transformation of Iopamidol during Chlorination

17-10-2014 | Friedrich M. Wendel; Christian Lütke Eversloh; Edward J. Machek; Stephen E. Duirk; Michael J. Plewa; Susan D. Richar ..., Environmental Science & Technology, 2014

The transformation of the iodinated X-ray contrast media (ICM) iopamidol, iopromide, iohexol, iomeprol, and diatrizoate was examined in purified water over the pH range from 6.5 to 8.5 in the presence of sodium hypochlorite, monochloramine, and chlorine dioxide. In the presence of aqueous ...

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Characterization of Polar Organosulfates in Secondary Organic Aerosol from the Green Leaf Volatile 3-Z-Hexenal

17-10-2014 | Mohammad Safi Shalamzari; Ariane Kahnt; Reinhilde Vermeylen; Tadeusz E. Kleindienst; Michael Lewandowski; Filip Cuyc ..., Environmental Science & Technology, 2014

Evidence is provided that the green leaf volatile 3-Z-hexenal serves as a precursor for biogenic secondary organic aerosol through the formation of polar organosulfates (OSs) with molecular weight (MW) 226. The MW 226 C6–OSs were chemically elucidated, along with structurally similar MW 212 ...

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Predicting the Effects of Nanoscale Cerium Additives in Diesel Fuel on Regional-Scale Air Quality

16-10-2014 | Garnet B. Erdakos; Prakash V. Bhave; George A. Pouliot; Heather Simon; Rohit Mathur, Environmental Science & Technology, 2014

Diesel vehicles are a major source of air pollutant emissions. Fuel additives containing nanoparticulate cerium (nCe) are currently being used in some diesel vehicles to improve fuel efficiency. These fuel additives also reduce fine particulate matter (PM2.5) emissions and alter the emissions of ...

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