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Electrochemical and photocatalytic reduction of perchlorate ion

2002; UWA Publishing; Volume: 51; Issue: 7 Linguagem: Inglês

10.2166/aqua.2002.0033

1365-2087

Thomas L. Theis, Amy K. Zander, Xiang Li, Jeosadaque J. Sene, Marc A. Anderson,

Water Treatment and Disinfection

Research Article| November 01 2002 Electrochemical and photocatalytic reduction of perchlorate ion Thomas L. Theis; Thomas L. Theis 1Center for Environmental Management, Clarkson University, Potsdam, NY 13699-5715, USA Present address: Director, Institute for Environmental Science and Policy, University of Illinois at Chicago, 2121 West Taylor Street, Chicago, IL 60612-7260, USA Search for other works by this author on: This Site PubMed Google Scholar Amy K. Zander; Amy K. Zander 2Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699-5710, USA Tel: 315-268-6532 Fax: 315-268-7985; E-mail: zander@clarkson.edu Search for other works by this author on: This Site PubMed Google Scholar Xiang Li; Xiang Li 2Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699-5710, USA Search for other works by this author on: This Site PubMed Google Scholar Jeosadaque Sene; Jeosadaque Sene 3Environmental Chemistry Program, University of Wisconsin, 660 N. Park Street, Madison, WI 53706, USA Search for other works by this author on: This Site PubMed Google Scholar Marc A. Anderson Marc A. Anderson 3Environmental Chemistry Program, University of Wisconsin, 660 N. Park Street, Madison, WI 53706, USA Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2002) 51 (7): 367–374. https://doi.org/10.2166/aqua.2002.0033 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Twitter LinkedIn Tools Icon Tools Cite Icon Cite Permissions Search Site Search nav search search input Search input auto suggest search filter All ContentAll JournalsThis Journal Search Advanced Search Citation Thomas L. Theis, Amy K. Zander, Xiang Li, Jeosadaque Sene, Marc A. Anderson; Electrochemical and photocatalytic reduction of perchlorate ion. Journal of Water Supply: Research and Technology-Aqua 1 November 2002; 51 (7): 367–374. doi: https://doi.org/10.2166/aqua.2002.0033 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex The presence of perchlorate in water supplies may have deleterious human health effects. Electrochemical and electrophotocatalytic reduction of the perchlorate ion to the chloride ion were assessed at laboratory scale. Studies were carried out in two-chambered batch reactor systems in which the cathodic and anodic compartments were separated by an ion exchange membrane. Electrodes consisted of titanium coated with a thin film of small TiO2 particles. Test water systems were buffered to an acid pH and a background electrolyte was added. Applied voltages ranged from −1.75 to −2.0 v. For photolytic systems, ultraviolet light was supplied. Initial perchlorate concentrations ranged from 5×10−2 M to 5×10−7 M. Reduction initially proceeded rapidly but slowed with time. The percentage of perchlorate electrochemically reduced after 2 h was found to range from less than 1% at the highest concentration to 30–35% at lower concentrations. The extent of photocatalytic reduction at high perchlorate concentrations was approximately five times greater than for electrochemical reduction at the same concentrations. An additional fourfold improvement in reduction percentage was noted when the electrode was doped with vanadium. A mathematical model suggested that the limiting factor in perchlorate reduction was competition among anions for active sites on the electrode surface. Application of this technology for decontamination of water supplies will require further advances in electrode technology and/or innovations in engineering design. drinking water, electrolytic reduction, perchlorate, photocatalytic reduction This content is only available as a PDF. © IWA Publishing 2002 You do not currently have access to this content.