文献类型：期刊文献

英文题名：Degradation of trichloroethylene in aqueous solution by calcium peroxide activated with ferrous ion

作者：Zhang, Xiang[1];Gu, Xiaogang[1];Lu, Shuguang[1];Miao, Zhouwei[1];Xu, Minhui[1];Fu, Xiaori[1];Qiu, Zhaofu[1];Sui, Qian[1]

机构：[1]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2015

卷号：284

起止页码：253

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20144800258654);WOS:【SCI-EXPANDED(收录号:WOS:000347581900030)】；

基金：This study was financially supported by a grant from the National Environmental Protection Public Welfare Science and Technology Research Program of China (No. 201109013), the National Natural Science Foundation of China (No. 41373094 and No. 51208199), the Shanghai Natural Science Funds (No. 12ZR1408000), China Postdoctoral Science Foundation (No. 2013T60429), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Trichloroethylene; Calcium peroxide; Ferrous ion; Reactive oxygen species; Groundwater remediation

摘要：The application of calcium peroxide (CaO2) activated with ferrous ion to stimulate the degradation of trichloroethylene (TCE) was investigated. The experimental results showed that TCE could be completely degraded in 5 min at a CaO2/Fe(II)/TCE molar ratio of 4/8/1. Probe compound tests demonstrated the presence of reactive oxygen species HO center dot and O-2(-center dot) in CaO2/Fe(II) system, while scavenging tests indicated that HO center dot was the dominant active species responsible for TCE removal, and O-2(-center dot) could promote TCE degradation in CaO2/Fe(II) system. In addition, the influences of initial solution pH and solution matrix were evaluated. It suggested that the elevation of initial solution pH suppressed TCE degradation. Cl- had significant scavenging effect on TCE removal, whereas HCO3- of high concentration showed favorable function. The influences of NO3- and SO42- could be negligible, while natural organic matter (NOM) had a negative effect on TCE removal at a relatively high concentration. The results demonstrated that the technique of CaO2 activated with ferrous ion is a highly promising technique in in situ chemical oxidation (ISCO) remediation in TCE contaminated sites. (C) 2014 Published by Elsevier B.V.