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Arsenite removal from aqueous solution by a microbial fuel cell-zerovalent iron hybrid process.
J Hazard Mater. 2013 Oct 15; 261:621-7.JH

Abstract

Conventional zerovalent iron (ZVI) technology has low arsenic removal efficiency because of the slow ZVI corrosion rate. In this study, microbial fuel cell (MFC)-zerovalent iron (MFC-ZVI) hybrid process has been constructed and used to remove arsenite (As(III)) from aqueous solutions. Our results indicate that the ZVI corrosion directly utilizes the low-voltage electricity generated by MFC in the hybrid process and both the ZVI corrosion rate and arsenic removal efficiency are therefore substantially increased. The resultant water qualities are compliant with the recommended standards of EPA and WHO. Compared to the ZVI process alone, the H2O2 generation rate and output are dramatically improved in MFC-ZVI hybrid process. Strong oxidants derived from H2O2 can rapidly oxidize As(III) into arsenate (As(V)), which helps to improve the As(III) removal efficiency. The distribution analysis of As and Fe indicates that the As/Fe molar ratio of the flocs in solution is much higher in the MFC-ZVI hybrid process. This phenomenon results from the different arsenic species and hydrous ferric oxides species in these two processes. In addition, the electrosorption effect in the MFC-ZVI hybrid process also contributed to the arsenic removal by concentrating As(V) in the vicinity of the iron electrode.

Authors+Show Affiliations

Department of Environmental Engineering, Peking University, Beijing 100871, China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23995558

Citation

Xue, An, et al. "Arsenite Removal From Aqueous Solution By a Microbial Fuel Cell-zerovalent Iron Hybrid Process." Journal of Hazardous Materials, vol. 261, 2013, pp. 621-7.
Xue A, Shen ZZ, Zhao B, et al. Arsenite removal from aqueous solution by a microbial fuel cell-zerovalent iron hybrid process. J Hazard Mater. 2013;261:621-7.
Xue, A., Shen, Z. Z., Zhao, B., & Zhao, H. Z. (2013). Arsenite removal from aqueous solution by a microbial fuel cell-zerovalent iron hybrid process. Journal of Hazardous Materials, 261, 621-7. https://doi.org/10.1016/j.jhazmat.2013.07.072
Xue A, et al. Arsenite Removal From Aqueous Solution By a Microbial Fuel Cell-zerovalent Iron Hybrid Process. J Hazard Mater. 2013 Oct 15;261:621-7. PubMed PMID: 23995558.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arsenite removal from aqueous solution by a microbial fuel cell-zerovalent iron hybrid process. AU - Xue,An, AU - Shen,Zhong-Zheng, AU - Zhao,Bin, AU - Zhao,Hua-Zhang, Y1 - 2013/08/07/ PY - 2013/03/11/received PY - 2013/07/20/revised PY - 2013/07/22/accepted PY - 2013/9/3/entrez PY - 2013/9/3/pubmed PY - 2014/6/4/medline KW - Arsenic removal KW - Arsenite KW - Electrosorption KW - Microbial fuel cell KW - Zerovalent iron SP - 621 EP - 7 JF - Journal of hazardous materials JO - J Hazard Mater VL - 261 N2 - Conventional zerovalent iron (ZVI) technology has low arsenic removal efficiency because of the slow ZVI corrosion rate. In this study, microbial fuel cell (MFC)-zerovalent iron (MFC-ZVI) hybrid process has been constructed and used to remove arsenite (As(III)) from aqueous solutions. Our results indicate that the ZVI corrosion directly utilizes the low-voltage electricity generated by MFC in the hybrid process and both the ZVI corrosion rate and arsenic removal efficiency are therefore substantially increased. The resultant water qualities are compliant with the recommended standards of EPA and WHO. Compared to the ZVI process alone, the H2O2 generation rate and output are dramatically improved in MFC-ZVI hybrid process. Strong oxidants derived from H2O2 can rapidly oxidize As(III) into arsenate (As(V)), which helps to improve the As(III) removal efficiency. The distribution analysis of As and Fe indicates that the As/Fe molar ratio of the flocs in solution is much higher in the MFC-ZVI hybrid process. This phenomenon results from the different arsenic species and hydrous ferric oxides species in these two processes. In addition, the electrosorption effect in the MFC-ZVI hybrid process also contributed to the arsenic removal by concentrating As(V) in the vicinity of the iron electrode. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/23995558/Arsenite_removal_from_aqueous_solution_by_a_microbial_fuel_cell_zerovalent_iron_hybrid_process_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(13)00551-7 DB - PRIME DP - Unbound Medicine ER -