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Particle Coating-Dependent Interaction of Molecular Weight Fractionated Natural Organic Matter: Impacts on the Aggregation of Silver Nanoparticles

15-May-2015 | Yongguang Yin; Mohai Shen; Zhiqiang Tan; Sujuan Yu; Jingfu Liu; Guibin Jiang, Environmental Science & Technology, 2015

Ubiquitous natural organic matter (NOM) plays an important role in the aggregation state of engineered silver nanoparticles (AgNPs) in aquatic environment, which determines the transport, transformation, and toxicity of AgNPs. As various capping agents are used as coatings for nanoparticles and ...

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Removal of sulphur black dye from its aqueous solution using alginate from Sargassum sp. (Brown algae) as a coagulant

12-May-2015 | G. Vijayaraghavan, S. Shanthakumar, Environmental Progress, 2015

This study deals with the coagulation potential of alginate extracted from marine algae Sargassum sp. for the removal of sulphur black dye from its aqueous solution. The alginate extraction was found to be efficient (44.8%) and the extracted alginate was characterized by Fourier transform ...

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Enhanced adsorptive removal of a model acid dye bromothymol blue from aqueous solution using magnetic chitosan‐bamboo sawdust composite: Batch and column studies

12-May-2015 | Tabrez A. Khan, Momina Nazir, Environmental Progress, 2015

The removal of an acid dye bromothymol blue (BTB) from aqueous solution using Fe2O3/chitosan‐bamboo sawdust (FeCBSD) composite was studied. Isotherm modeling indicated that the data best followed Langmuir isotherm, with adsorption capacity (qm) of 217.39 mg/g at a contact time of 30 min and an ...

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Photolysis Kinetics, Mechanisms, and Pathways of Tetrabromobisphenol A in Water under Simulated Solar Light Irradiation

12-May-2015 | Xiaowen Wang; Xuefeng Hu; Hua Zhang; Fei Chang; Yongming Luo, Environmental Science & Technology, 2015

The photolysis of tetrabromobisphenol A (TBBPA) in aqueous solution under simulated solar light irradiation was studied under different conditions to find out mechanisms and pathways that control the transformation of TBBPA during photoreaction. Particular attention was paid to the identification ...

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Direct and Complete Phosphorus Recovery from Municipal Wastewater Using a Hybrid Microfiltration-Forward Osmosis Membrane Bioreactor Process with Seawater Brine as Draw Solution

06-May-2015 | Guanglei Qiu; Yi-Ming Law; Subhabrata Das; Yen-Peng Ting, Environmental Science & Technology, 2015

We report a hybrid microfiltration-forward osmosis membrane bioreactor (MF-FOMBR) for direct phosphorus recovery from municipal wastewater in the course of its treatment. In the process, a forward osmosis (FO) membrane and a microfiltration (MF) membrane are operated in parallel in a bioreactor. ...

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Anaerobic Arsenite Oxidation by an Autotrophic Arsenite-Oxidizing Bacterium from an Arsenic-Contaminated Paddy Soil

05-May-2015 | Jun Zhang; Wuxian Zhou; Bingbing Liu; Jian He; Qirong Shen; Fang-Jie Zhao, Environmental Science & Technology, 2015

Microbe-mediated arsenic (As) redox reactions play an important role in the biogeochemical cycling of As. Reduction of arsenate [As(V)] generally leads to As mobilization in paddy soils and increased As availability to rice plants, whereas oxidation of arsenite [As(III)] results in As ...

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Equilibrium, Kinetics, and Spectroscopic Studies of SF6 Hydrate in NaCl Electrolyte Solution

30-Apr-2015 | Youngrok Seo; Donghyun Moon; Changho Lee; Jeong-Woo Park; Byeong-Soo Kim; Gang-Woo Lee; Pratik Dotel; Jong-Won Lee; ..., Environmental Science & Technology, 2015

Many studies have focused on desalination via hydrate formation; however, for their potential application, knowledge pertaining to thermodynamic stability, formation kinetics, and guest occupation behavior in clathrate hydrates needs to be determined. Herein, the phase equilibria of SF6 hydrates ...

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Matrix Normalized MALDI-TOF Quantification of a Fluorotelomer-Based Acrylate Polymer

29-Apr-2015 | Keegan Rankin; Scott A. Mabury, Environmental Science & Technology, 2015

The degradation of fluorotelomer-based acrylate polymers (FTACPs) has been hypothesized to serve as a source of the environmental contaminants, perfluoroalkyl carboxylates (PFCAs). Studies have relied on indirect measurement of presumed degradation products to evaluate the environmental fate of ...

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Adsorption of Rhodamine B onto a yellow–brown soil: Kinetics, thermodynamics, and role of soil organic matter

24-Apr-2015 | Hongxia Huang, Gaoke Zhang, Environmental Progress, 2015

The environmental behavior of organic pollutants in soils depends on their adsorption properties onto soils. In this article, the adsorption process of Rhodamine B (RhB) from an aqueous solution onto a yellow–brown soil in Central China was studied. The isotherms and the kinetic data of the RhB ...

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IJERPH, Vol. 12, Pages 4546-4571: Community, State, and Federal Approaches to Cumulative Risk Assessment: Challenges and Opportunities for Integration

24-Apr-2015 | Barzyk, Timothy M.; Wilson, Sacoby ; Wilson, Anthony, International Journal of Environmental Research and Public Health, 2015

Community, state, and federal approaches to conventional and cumulative risk assessment (CRA) were described and compared to assess similarities and differences, and develop recommendations for a consistent CRA approach, acceptable across each level as a rigorous scientific methodology, ...

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