文献类型：期刊文献

英文题名：Insight into trichloroethene removal in alkaline condition with the presence of surfactant based on persulfate system

作者：Xu, Zhiqiang[1];Cai, Lankun[1];Liang, Xue[2];Lyu, Shuguang[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Jilin Univ, Natl & Local Joint Engn Lab Petrochem Contaminated, Changchun 130021, Peoples R China

年份：2022

卷号：10

期号：5

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20223912783319);WOS:【SCI-EXPANDED(收录号:WOS:000855663900002)】；

基金：This study was financially supported by the grants from the National Key Research and Development Program of China (No. 2018YFC1802500) and "One Belt and One Road" International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (No. 19230742200).

语种：英文

外文关键词：Trichloroethene; Sodium dodecyl sulfate; Critical micelle concentration; Persulfate; Groundwater remediation

摘要：Trichloroethene (TCE) degradation was investigated in Fe(II)/citric acid (CA) activated persulfate (PS) system containing surfactant sodium dodecyl sulfate (SDS). Only 37.7% removal of TCE was achieved at PS/Fe(II)/CA/ TCE molar ratio of 40/20/20/1 in the presence of 2.3 g L-1 SDS with pH unadjusted (pH = 2.96). However, this result was significantly increased to 81% after adjusting the initial solution pH = 9.0. The presence of SDS inhibited TCE degradation and this inhibitory effect was initially increased and then declined with SDS con-centration increase from 0 to 9.2 g L-1. Radical scavenger experiments revealed that the major reactive oxygen species (ROS) contributed to TCE degradation were HO center dot and SO4-center dot, while less contribution was owed to O-2(-center dot). The intermediates of SDS were identified with GC-MS and possible decomposition pathway of SDS was proposed. The performance of TCE degradation in other solution matrixes were investigated. Actual groundwater tests showed that PS/Fe(II)/CA system possessed huge potential in remediating groundwater contaminated by TCE with SDS presence. This research found that alkaline condition was more favorable for TCE degradation in PS/Fe(II)/CA system in the presence of SDS and the possible reasons for this phenomenon were explored from various aspects.