Synergetic degradation of Fe/Cu/C for groundwater polluted by trichloroethylene.
This study investigated the enhancement of synergetic degradation of Fe/Cu/C (Fe: commercial iron, Cu: solid product of Fe reacted with CuSO(4), C: carbon powder) for simulated groundwater contaminated by trichloroethylene (TCE). Zero valent iron (ZVI) as a reducing agent was proved to be effective for TCE removal. The Fe/Cu/C system resulted in higher reduction efficiency as a result of the synergetic role of Fe/Cu and Fe/C microelectrode than the Fe (ZVI) or Fe/Cu system, and the half-life was only about 0.4 h. When m(Fe) achieved 12.5 g L(-1), the residual concentration of TCE almost leveled off. Fe:Cu = 10:1 or m(C) = 0.0086 g can induce the optimum function for TCE degradation. A neutral condition was appropriate for TCE degradation, and an acidic system slightly favored TCE dechlorination compared with an alkaline system. GC/MS analysis indicated that TCE was dechlorinated to 1,1-dichloroethene (1,1-DCE), cis-1,2-dichloroethene (cis-DCE) and vinyl chloride (VC), and 1,1-DCE might be the precursor. Fe/Cu/C reduction is a highly promising technique for TCE removal, and it is an excellent alternative to enhance TCE reductive dechlorination.
East China University of Science and Technology, Shanghai, China. wzhang@ecust.edu.cn
Wei
W
Zhang
Li
L
Li
Kuangfei
K
Lin
Bang
B
Xiong
Bingzhi
B
Li
Shuguang
S
Lu
Meijin
M
Guo
Xinhong
X
Cui
D008401:Gas Chromatography-Mass Spectrometry; D060587:Groundwater / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008839:Microelectrodes; D014241:Trichloroethylene / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D014874:Water Pollutants, Chemical; D014241:Trichloroethylene