文献类型：期刊文献

英文题名：Efficient degradation of trichloroethene with the existence of surfactants by peroxymonosulfate activated by nano-zero-valent iron: performance and mechanism investigation

作者：Wang, Peng[1];Xu, Zhiqiang[1];Zeng, Guilu[1];Lyu, Shuguang[1]

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

年份：2023

卷号：30

期号：16

起止页码：48351

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;EI(收录号：20242816667483);WOS:【SCI-EXPANDED(收录号:WOS:000931997400003)】；

基金：The study was financially supported by the National Key R&D 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：Trichloroethylene; Peroxymonosulfate; Nano-zero-valent iron activation; Surfactants; Groundwater remediation

摘要：In this study, the degradation of trichloroethylene (TCE) with the existence of tween-80 (TW-80) or sodium dodecyl sulfate (SDS) using peroxymonosulfate (PMS) activated by nano-zero-valent iron (nZVI) was investigated. Over 87.6% TCE (with 1.3 g L-1 TW-80 presence) was degraded by 0.9 mM PMS and 0.12 g L(-1 )nZVI, while 89.7% TCE (with 2.3 g L-1 SDS presence) was degraded by 1.2 mM PMS and 0.20 g L-1 nZVI, in which more than 71.9% TCE with TW-80 existence and 87.5% TCE with SDS existence were dechlorinated. Besides, the effects of some factors (i.e., PMS and nZVI dosages, initial solution pH, and inorganic anions) on TCE removal were evaluated. The degradation of TCE was restrained continuously with increasing surfactant concentration, and TW-80 was more easily decomposed than SDS in PMS/nZVI system. Furthermore, sulfate radical (SO4-(center dot)) and hydroxyl radical (HO center dot) were demonstrated the main reactive oxygen species (ROS) contributing to TCE degradation and SO4-(center dot) played a dominant role through EPR tests and ROS scavenging experiments. Finally, the results of TCE degradation in actual groundwater confirmed that PMS/nZVI process has great advantages and potential in remediation of actual TCE-contaminated groundwater with TW-80 or SDS existence.