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Arsenic-Rich Acid Mine Water with Extreme Arsenic Concentration: Mineralogy, Geochemistry, Microbiology, and Environmental Implications

14-11-2014 | Juraj Majzlan; Jakub Plášil; Radek Škoda; Johannes Gescher; Felix Kögler; Anna Rusznyak; Kirsten Küsel; Thomas R. Ne ..., Environmental Science & Technology, 2014

Extremely arsenic-rich acid mine waters have developed by weathering of native arsenic in a sulfide-poor environment on the 10th level of the Svornost mine in Jáchymov (Czech Republic). Arsenic rapidly oxidizes to arsenolite (As2O3), and there are droplets of liquid on the arsenolite crust with ...


Role of Air Bubbles Overlooked in the Adsorption of Perfluorooctanesulfonate on Hydrophobic Carbonaceous Adsorbents

13-11-2014 | Pingping Meng; Shubo Deng; Xinyu Lu; Ziwen Du; Bin Wang; Jun Huang; Yujue Wang; Gang Yu; Baoshan Xing, Environmental Science & Technology, 2014

Hydrophobic interaction has been considered to be responsible for adsorption of perfluorooctanesulfonate (PFOS) on the surface of hydrophobic adsorbents, but the long C–F chain in PFOS is not only hydrophobic but also oleophobic. In this study, for the first time we propose that air bubbles on ...


Arsenic Mobility during Flooding of Contaminated Soil: The Effect of Microbial Sulfate Reduction

12-11-2014 | Edward D. Burton; Scott G. Johnston; Benjamin D. Kocar, Environmental Science & Technology, 2014

In floodplain soils, As may be released during flooding-induced soil anoxia, with the degree of mobilization being affected by microbial redox processes such as the reduction of As(V), Fe(III), and SO42–. Microbial SO42– reduction may affect both Fe and As cycling, but the processes involved and ...


Effects of Solution Chemistry on Adsorption of Selected Pharmaceuticals and Personal Care Products (PPCPs) by Graphenes and Carbon Nanotubes

10-11-2014 | Fei-fei Liu; Jian Zhao; Shuguang Wang; Peng Du; Baoshan Xing, Environmental Science & Technology, 2014

Adsorption of three selected pharmaceuticals and personal care products (PPCPs) (ketoprofen (KEP), carbamazepine (CBZ), and bisphenol A (BPA)) by two reduced graphene oxides (rGO1 and rGO2) and one commercial graphene was examined under different solution conditions. Single-walled carbon ...


Microbial Reduction of U(VI) under Alkaline Conditions: Implications for Radioactive Waste Geodisposal

07-11-2014 | Adam J. Williamson; Katherine Morris; Gareth T. W. Law; Athanasios Rizoulis; John M. Charnock; Jonathan R. Lloyd, Environmental Science & Technology, 2014

Although there is consensus that microorganisms significantly influence uranium speciation and mobility in the subsurface under circumneutral conditions, microbiologically mediated U(VI) redox cycling under alkaline conditions relevant to the geological disposal of cementitious intermediate level ...


Vapor Intrusion Screening Model for the Evaluation of Risk-Based Vertical Exclusion Distances at Petroleum Contaminated Sites

29-10-2014 | Iason Verginelli; Renato Baciocchi, Environmental Science & Technology, 2014

The key role of biodegradation in attenuating the migration of petroleum hydrocarbon vapors into the indoor environments has been deeply investigated in the last decades. Very recently, empirical screening levels for the separation distance from the source, above which the potential for vapor ...


Cr(VI) Reduction and Cr(III) Immobilization by Acinetobacter sp. HK-1 with the Assistance of a Novel Quinone/Graphene Oxide Composite

23-10-2014 | Hai-Kun Zhang; Hong Lu; Jing Wang; Ji-Ti Zhou; Meng Sui, Environmental Science & Technology, 2014

Cr(VI) biotreatment has attracted a substantial amount of interest due to its cost effectiveness and environmental friendliness. However, the slow Cr(VI) bioreduction rate and the formed organo-Cr(III) in solution are bottlenecks for biotechnology application. In this study, a novel strain, ...


A Novel Anaerobic Electrochemical Membrane Bioreactor (AnEMBR) with Conductive Hollow-fiber Membrane for Treatment of Low-Organic Strength Solutions

22-10-2014 | Krishna P. Katuri; Craig M. Werner; Rodrigo J. Jimenez-Sandoval; Wei Chen; Sungil Jeon; Bruce E. Logan; Zhiping Lai; ..., Environmental Science & Technology, 2014

A new anaerobic treatment system that combined a microbial electrolysis cell (MEC) with membrane filtration using electrically conductive, porous, nickel-based hollow-fiber membranes (Ni-HFMs) was developed to treat low organic strength solution and recover energy in the form of biogas. This new ...


Electrodriven Selective Transport of Cs+ Using Chlorinated Cobalt Dicarbollide in Polymer Inclusion Membrane: A Novel Approach for Cesium Removal from Simulated Nuclear Waste Solution

20-10-2014 | Sanhita Chaudhury; Arunasis Bhattacharyya; Asok Goswami, Environmental Science & Technology, 2014

The work describes a novel and cleaner approach of electrodriven selective transport of Cs from simulated nuclear waste solutions through cellulose tri acetate (CTA)/poly vinyl chloride (PVC) based polymer inclusion membrane. The electrodriven cation transport together with the use of highly Cs+ ...


Geochemical Processes Constraining Iron Uptake in Strategy II Fe Acquisition

14-10-2014 | W. D. C. Schenkeveld; Y. Schindlegger; E. Oburger; M. Puschenreiter; S. Hann; S. M. Kraemer, Environmental Science & Technology, 2014

Phytosiderophores (PS) are natural chelating agents, exuded by graminaceous plants (grasses) for the purpose of Fe acquisition (Strategy II). They can form soluble Fe complexes with soil-Fe that can be readily taken up. PS are exuded in a diurnal pulse release, and with the start of PS release a ...


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