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Simultaneous Removal of Nitrate and Trichloroethylene by Zero Valent Iron and Peat  

Min, Jee-Eun (Department of Civil Engineering, Hanyang University)
Kim, Mee-Jeong (Department of Civil Engineering, Hanyang University)
Park, Jae-Woo (Department of Civil Engineering, Hanyang University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.10, 2006 , pp. 1074-1081 More about this Journal
Abstract
As common pollutants in surface and groundwater, nitrate nitrogen($NO_3-N$) and trichloroethylene(TCE) can be chemically and biologically reduced by zero valent iron(ZVI) and peat soil. In batch microcosm experiments, chemical reduction of TCE and nitrate was supported by hydrogen from ZVI. For biological degradation of TCE and denitrification peat soil was introduced. ZVI reduced TCE, while peat provided TCE sorption site and microbes performing biological degradation. Nitrate reduction was also achieved by hydrogen from ZVI. In addition, indirect evidence of denitrification was observed. More reduction of TCE and nitrate was achieved by ZVI+peat treatment however nitrated reduction was hindered in the presence of TCE in the system due to the competition for hydrogen. TCE reduction mechanism was more dependent on ZVI, while nitrate was peat-dependent. Hydrogen and methane concentration showed that peat had various anaerobic denitryfing and halorespiring bacteria.
Keywords
Zero Valent Iron; Peat; Reduction; Nitrate; TCE;
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