文献类型：期刊文献

英文题名：Efficient removal of trichloroethene in oxidative environment by anchoring nano FeS on reduced graphene oxide supported nZVI catalyst: The role of FeS on oxidant decomposition and iron leakage

作者：Sun, Yong[1,2];Gu, Mengbin[1];Lyu, Shuguang[1,2];Brusseau, Mark L.[3];Li, Ming[1];Lyu, Yanchen[1];Xue, Yunfei[1];Qiu, Zhaofu[1];Sui, Qian[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 Arizona, Sch Earth & Environm Sci, Soil Water & Environm Sci Dept, 429 Shantz Bldg, Tucson, AZ 85721 USA

年份：2020

卷号：392

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20200808208417);WOS:【SCI-EXPANDED(收录号:WOS:000527016900060)】；

基金：This study was financially supported by the grant from the National Key R&D Program of China (No. 2018YFC1802500) and the International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (NO. 18230722700). The contributions of Mark Brusseau were supported by the NIEHS Superfund Research Program (PS 42 ES04940).

语种：英文

外文关键词：FeS@nZVI-rGO; Oxidation; Catalysis; Trichloroethene; Groundwater remediation

摘要：The performance of trichloroethene (TCE) removal was initially investigated in sodium persulfate (SPS) or potassium monopersulfate triple salt (PMS) oxidative environment by reduced graphene oxide (rGO) supported nZVI (nZVI-rGO) catalyst and further the role of sulphur by anchoring nano FeS on nZVI-rGO (FeS@nZVI-rGO) was evaluated. The high usage of oxidants and stability of FeS@nZVI-rGO catalyst were significantly improved due to the insoluble nature of this innovative catalyst by involvement of nano FeS which limited the rapid iron loss caused by the corrosion of active sites and mitigated rapid oxidants decomposition in FeS@nZVI-rGO/SPS and FeS@nZVI-rGO/PMS systems. The tests for target contaminant removal showed that over 95 % TCE could be removed at 100 mg L-1 FeS@nZVI-rGO and 1.2 mM SPS or 0.3 mM PMS dosages, in which over 85 % TCE could be dechlorinated. The reactive oxygen radicals (ROSs) generation mechanisms and their contribution to TCE removal were investigated through radical scavenge tests in both systems, indicating that both HO center dot and SO4-center dot were the major ROSs rather than O-2(-center dot). In conclusion, this study revealed the well function and fundamental mechanism of this innovative catalyst by anchoring nano FeS and worth of further demonstration of this technique in TCE contaminated groundwater remediation application.