Mechanism and Pathway of Tetrachloroethylene Dechlorination by Zero-Valent Iron with Cu or
Publication: Journal of Environmental Engineering
Volume 139, Issue 6
Abstract
Tetrachloroethylene (PCE) is a common contaminant in the groundwater. The mechanism and pathway of PCE dechlorination by zero-valent iron (Fe) in the presence of Cu (Fe–Cu), alone or with powdered activated carbon () were studied. The experimental results have demonstrated that (1) produced higher PCE removal efficiency than adsorption by C or dechlorination by Fe or Fe–Cu due to adsorption and the synergetic effects of Fe–Cu and Fe–C microelectrodes, (2) the batch PCE dechlorination was most rapid at the neutral pH, (3) dechlorination resulted in smaller and more porous Fe particles, and (4) PCE was sequentially dechlorinated to form trichloroethylene, dichloroethylenes (cis, 1,1, and trans isomers), methylene chloride, and vinyl chloride. dechlorination is an attractive technology for the remediation of PCE-contaminated groundwater.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China (40901148), the Science and Technology Committee Research Program of Shanghai (12DZ0502700), the Environmental Protection Science and Technology Research Program of Shanghai (2012-03), the National Forestry Public Welfare Science and Technology Research Program of China (201104088), and the National Environmental Protection Public Welfare Science and Technology Research Program of China (201109013). The authors also would like to thank the anonymous referees for their helpful comments on this paper.
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Published In
Journal of Environmental Engineering
Volume 139 • Issue 6 • June 2013
Pages: 803 - 809
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 27, 2012
Accepted: Jan 7, 2013
Published online: Jan 9, 2013
Published in print: Jun 1, 2013
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