Trichloroethylene (TCE), a widely used solvent, is often determined in groundwater and is one of biologically refractory organic contaminants. The aim of the study is to use a new chemical oxidation method to degrade TCE source pollution in groundwater. Fenton-like reactions (hydrogen peroxide catalyzed by iron minerals generates hydroxyl radicals) and sodium persulfate activation (sodium persulfate activated by heat/iron minerals to produce sulfate radicals) have strong oxidative capacity to degrade a wide range of organic contaminants. In this work, hydrogen peroxide and/or sodium persulfate catalyzed by siderite (designated as STO, SO, PO systems, respectively) degrading TCE in groundwater were investigated. Removal rates of TCE in STO, SO, and PO systems were 100%, 57%, 20%, respectively. The order of TCE removal rates is in agreement with that of hydroxyl radicals generated in the systems, indicating that hydroxyl radicals play a critical role in removing TCE. No by-product except CO2, Cl− and H2O generated as final products in the STO system suggests that TCE was near completely mineralized. The results show that the STO is an effective method to treat TCE contaminated source in groundwater.
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Research Article|
February 01 2013
Removal of trichloroethylene in groundwater with two oxidants: siderite catalyzed hydrogen peroxide and sodium persulfate Available to Purchase
Weiying Huang;
1School of Earth and Space Sciences, Peking University, Beijing 100871, China
2Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
E-mail: [email protected]
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Fei Liu;
Fei Liu
2Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
*Present address: Shuihuan Mailbox, China University of Geosciences, Beijing. No. 29 Xueyuan Road, Haidian District, Bejing 100083, China
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Ni Yan;
Ni Yan
2Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
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Anhuai Lu;
Anhuai Lu
1School of Earth and Space Sciences, Peking University, Beijing 100871, China
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Honghan Chen;
Honghan Chen
2Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
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Liang Chen;
Liang Chen
2Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
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Fei Wang
Fei Wang
3University of Science and Technology, Beijing 100083, China
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Water Supply (2013) 13 (1): 36–43.
Article history
Received:
February 29 2012
Accepted:
June 27 2012
Citation
Weiying Huang, Fei Liu, Ni Yan, Anhuai Lu, Honghan Chen, Liang Chen, Fei Wang; Removal of trichloroethylene in groundwater with two oxidants: siderite catalyzed hydrogen peroxide and sodium persulfate. Water Supply 1 February 2013; 13 (1): 36–43. doi: https://doi.org/10.2166/ws.2012.072
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