文献类型：期刊文献

英文题名：Application of calcium peroxide activated with Fe(II)-EDDS complex in trichloroethylene degradation

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]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2016

卷号：160

起止页码：1

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20162702550319);WOS:【SCI-EXPANDED(收录号:WOS:000381172000001)】；

基金：This study was financially supported by the grant from the National Natural Science Foundation of China (No.41373094 and No.51208199), China Postdoctoral Science Foundation (2015M570341) and the Fundamental Research Funds for the Central Universities (22A201514057).

语种：英文

外文关键词：Calcium peroxide; Fe(II)-EDDS complex; Trichloroethylene; Free radicals

摘要：This study was conducted to assess the application of calcium peroxide (CP) activated with Fe(II) chelated by (S,S)-ethylenediamine-N,N'-disuccinic acid (EDDS) to enhance trichloroethylene (TCE) degradation in aqueous solution. It was indicated that EDDS prevented soluble iron from precipitation, and the optimum molar ratio of Fe(II)/EDDS to accelerate TCE degradation was 1/1. The influences of initial TCE, CP and Fe(II)-EDDS concentration were also investigated. The combination of CP and Fe(II)-EDDS complex rendered the efficient degradation of TCE at near neutral pH range. Chemical probe and scavenger tests identified that TCE degradation mainly owed to the oxidation of HO center dot while O-2(-center dot) promoted HO center dot generation. Cl-, HCO3- and humic acid were found to inhibit CP/Fe(II)-EDDS performance on different levels. In conclusion, the application of CP activated with Fe(II)-EDDS complex is a promising technology in chemical remediation of groundwater, while further research in practical implementation is needed. (C) 2016 Elsevier Ltd. All rights reserved.