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Contributions of BrCl, Br2, BrOCl, Br2O, and HOBr to Regiospecific Bromination Rates of Anisole and Bromoanisoles in Aqueous Solution

03-Apr-2015 | John D. Sivey; Mark A. Bickley; Daniel A. Victor, Environmental Science & Technology, 2015

When bromide-containing waters are chlorinated, conventional wisdom typically assumes HOBr is the only active brominating agent. Several additional and often-overlooked brominating agents (including BrCl, Br2, BrOCl, Br2O) can form in chlorinated waters, albeit at generally lower concentrations ...


Multiple Signal Amplified Electrochemiluminescent Immunoassay for Hg2+ Using Graphene-Coupled Quantum Dots and Gold Nanoparticles-Labeled Horseradish Peroxidase

01-Apr-2015 | Fudong Cai; Qing Zhu; Kang Zhao; Anping Deng; Jianguo Li, Environmental Science & Technology, 2015

A multiple signal amplification strategy was designed for an ultrasensitive competitive immunoassay for Hg2+. This strategy was achieved using graphene conjugated with a large number of CdSe quantum dots to enhance the basal signal and enormous horseradish peroxidase (HRP) labeled with gold ...


Destruction of Methyl Bromide Sorbed to Activated Carbon by Thiosulfate or Electrolysis

27-Mar-2015 | Yu Yang; Yuanqing Li; Spencer S. Walse; William A. Mitch, Environmental Science & Technology, 2015

Methyl bromide (CH3Br) is widely used as a fumigant for postharvest and quarantine applications for agricultural products at port facilities due to the short treatment period required, but it is vented from fumigation chambers to the atmosphere after its use. Due to the potential contributions of ...


Oxidative Degradation of Nalidixic Acid by Nano-magnetite via Fe2+/O2-Mediated Reactions

20-Mar-2015 | Sandy G. Ardo; Sylvie Nélieu; Georges Ona-Nguema; Ghislaine Delarue; Jessica Brest; Elsa Pironin; Guillaume Morin, Environmental Science & Technology, 2015

Organic pollution has become a critical issue worldwide due to the increasing input and persistence of organic compounds in the environment. Iron minerals are potentially able to degrade efficiently organic pollutants sorbed to their surfaces via oxidative or reductive transformation processes. ...


Highly Efficient Forward Osmosis Based on Porous Membranes—Applications and Implications

19-Mar-2015 | Saren Qi; Ye Li; Yang Zhao; Weiyi Li; Chuyang Y. Tang, Environmental Science & Technology, 2015

For the first time, forward osmosis (FO) was performed using a porous membrane with an ultrafiltration (UF)-like rejection layer and its feasibility for high performance FO filtration was demonstrated. Compared to traditional FO membranes with dense rejection layers, the UF-like FO membrane was 2 ...


The Relationship of Physicochemical Properties to the Antioxidative Activity of Free Amino Acids in Fenton System

19-Mar-2015 | Sonja Milić; Jelena Bogdanović Pristov; Dragosav Mutavdžić; Aleksandar Savić; Mihajlo Spasić; Ivan Spasojević, Environmental Science & Technology, 2015

Herein we compared antioxidative activities (AA) of 25 free l-amino acids (FAA) against Fenton system-mediated hydroxyl radical (HO•) production in aqueous solution, and examined the relation between AA and a set of physicochemical properties. The rank order according to AA was: Trp > norleucine ...


Enrichment of Cesium and Rubidium in Weathered Micaceous Materials at the Savannah River Site, South Carolina

17-Mar-2015 | Laura K. Zaunbrecher; W. Crawford Elliott; J. M. Wampler; Nicolas Perdrial; Daniel I. Kaplan, Environmental Science & Technology, 2015

The enrichment of Cs and Rb relative to Ba, Sr, and K in three soils representing a range of soil maturities was determined to investigate the long-term sorption behavior of these elements in upland soils of the Savannah River Site (SRS). Elemental mass fractions normalized to upper continental ...


Influence of Copper Recovery on the Water Quality of the Acidic Berkeley Pit Lake, Montana, U.S.A.

12-Mar-2015 | Nicholas J. Tucci; Christopher H. Gammons, Environmental Science & Technology, 2015

The Berkeley Pit lake in Butte, Montana, formed by flooding of an open-pit copper mine, is one of the world’s largest accumulations of acidic, metal-rich water. Between 2003 and 2012, approximately 2 × 1011 L of pit water, representing 1.3 lake volumes, were pumped from the bottom of the lake to ...


Application of Dual Carbon–Bromine Isotope Analysis for Investigating Abiotic Transformations of Tribromoneopentyl Alcohol (TBNPA)

11-Mar-2015 | Anna Kozell; Yinon Yecheskel; Noa Balaban; Ishai Dror; Ludwik Halicz; Zeev Ronen; Faina Gelman, Environmental Science & Technology, 2015

Many of polybrominated organic compounds, used as flame retardant additives, belong to the group of persistent organic pollutants. Compound-specific isotope analysis is one of the potential analytical tools for investigating their fate in the environment. However, the isotope effects associated ...


In Situ Sensor Technology for Simultaneous Spectrophotometric Measurements of Seawater Total Dissolved Inorganic Carbon and pH

10-Mar-2015 | Zhaohui Aleck Wang; Frederick N. Sonnichsen; Albert M. Bradley; Katherine A. Hoering; Thomas M. Lanagan; Sophie N. C ..., Environmental Science & Technology, 2015

A new, in situ sensing system, Channelized Optical System (CHANOS), was recently developed to make high-resolution, simultaneous measurements of total dissolved inorganic carbon (DIC) and pH in seawater. Measurements made by this single, compact sensor can fully characterize the marine carbonate ...


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