文献类型：期刊文献

英文题名：Trichloroethene degradation by nanoscale CaO 2 activated with Fe(II)/FeS: The role of FeS and the synergistic activation mechanism of Fe(II)/FeS

作者：Sun, Yong[1,2];Danish, Muhammad[3];Ali, Meesam[1,4];Shan, Ali[1,5];Li, Ming[1];Lyu, Yanchen[1];Qiu, Zhaofu[1];Sui, Qian[1];Zang, Xueke[6];Lyu, Shuguang[1,2]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]Univ Engn & Technol UET, Chem Engn Dept, Lahore Faisalabad Campus,GT Rd, Lahore, Pakistan;[4]Muhammad Nawaz Sharif Univ Engn & Technol, Dept Chem Engn, Multan 60000, Pakistan;[5]Univ Lahore, Dept Environm Sci, Lahore 46000, Pakistan;[6]Shanghai Yaxin Construct Engn Co Ltd, Shanghai 200436, Peoples R China

年份：2020

卷号：394

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20201408373831);WOS:【SCI-EXPANDED(收录号:WOS:000540937000008)】；

基金：This study was financially supported by a grant from the National Natural Science Foundation of China (No. 41977164), "One Belt and One Road" International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (No. 19230742200), and Science and Technology Innovation Action Plan of Shanghai Science and Technology Committee (No. 18DZ1204400).

语种：英文

外文关键词：Nanotechnology - Peroxides - Molar ratio - Groundwater - Iron compounds - Trichloroethylene - Groundwater pollution - Oxidation

摘要：The performance of trichloroethene (TCE) degradation was significantly improved with the addition of FeS in nanoscale calcium peroxide (nCP) environment and the enhancement of HO[rad] generation in nCP/Fe(II)/FeS system was confirmed by comparison with nCP/Fe(II) and nCP/FeS systems. The role of FeS in nCP/Fe(II)/FeS system demonstrated that the majority of reactive oxygen radicals (ROSs) was generated on the catalyst surface due to the heterogeneous reaction through FeS activated nCP in one hand, and the reductive FeS could promote TCE degradation by regenerating Fe(II) from Fe(III) in the other hand. The probe as well as scavenger test results suggested that the major ROSs was HO[rad] rather than O2?[rad]. Over 91.5% TCE could be degraded at the molar ratio of 2/2/4/1 of nCP/Fe(II)/FeS/TCE, in which more than 95.5% TCE was dechlorinated. The effect of surfactants on TCE degradation was evaluated. In contrast, further investigation found that BTEX removal was inhibited with the addition of FeS. In conclusion, this study revealed the well function and fundamental synergistic mechanism of FeS. Moreover, the degradation of TCE in actual groundwater confirmed that nCP/Fe(II)/FeS technique has a great advantage and potential in TCE contaminated groundwater remediation in ISCO practice. ? 2020 Elsevier B.V.