Trichloroethene (TCE) degradation by Fe(II)-activated sodium percarbonate (SPC) in the presence of citric acid (CA) in aqueous solution was investigated. The results indicated that the presence of CA enhanced TCE degradation significantly by promoting HO• generation. The presence of Cl−, HCO3− and the initial solution pH appeared to be not negligible on the effect of TCE oxidation, while humic acid had no influence on TCE degradation. The generation of HO• and O2−• in the SPC/Fe(II)/CA system was confirmed with chemical probes, and the radical scavenging tests showed that TCE degradation was due to direct oxidation by HO•. Acidic pH condition was favorable for TCE degradation. In summary, this study provided detailed information for the application of the CA-enhanced Fe(II)-activated SPC technique for TCE-contaminated groundwater remediation.
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Research Article|
October 01 2016
Enhanced degradation of trichloroethene by sodium percarbonate activated with Fe(II) in the presence of citric acid Available to Purchase
Xueke Zang;
Xueke Zang
1Shanghai Institute of Geological Engineering Exploration, Shanghai 200072, China
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Xiaogang Gu;
Xiaogang Gu
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Shuguang Lu;
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
E-mail: [email protected]
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Zhouwei Miao;
Zhouwei Miao
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Xiang Zhang;
Xiang Zhang
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Xiaori Fu;
Xiaori Fu
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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George Y. Fu;
George Y. Fu
3Department of Construction Management & Civil Engineering Technology, Georgia Southern University, Statesboro, GA 30460-8047, USA
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Zhaofu Qiu;
Zhaofu Qiu
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Qian Sui
Qian Sui
2State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Water Supply (2017) 17 (3): 665–673.
Article history
Received:
March 10 2016
Accepted:
June 23 2016
Citation
Xueke Zang, Xiaogang Gu, Shuguang Lu, Zhouwei Miao, Xiang Zhang, Xiaori Fu, George Y. Fu, Zhaofu Qiu, Qian Sui; Enhanced degradation of trichloroethene by sodium percarbonate activated with Fe(II) in the presence of citric acid. Water Supply 1 May 2017; 17 (3): 665–673. doi: https://doi.org/10.2166/ws.2016.117
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