详细信息
Enhanced Transformation of Emerging Contaminants by Permanganate in the Presence of Redox Mediators ( SCI-EXPANDED收录 EI收录) 被引量:39
文献类型:期刊文献
英文题名:Enhanced Transformation of Emerging Contaminants by Permanganate in the Presence of Redox Mediators
作者:Shi, Zhenyu[1,2] Jin, Can[3] Bai, Ruopeng[1] Gao, Zhanqi[2] Zhang, Jing[1] Zhu, Liang[1] Zhao, Zhiwei[1] Strathmann, Timothy J.[4]
第一作者:Shi, Zhenyu
通信作者:Zhang, J[1];Zhao, ZW[1]
机构:[1]Chongqing Univ, Chongqing, Peoples R China;[2]Environm Monitoring Ctr Jiangsu Prov, Nanjing, Peoples R China;[3]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing, Peoples R China;[4]Colorado Sch Mines, Golden, CO 80401 USA
年份:2020
卷号:54
期号:3
起止页码:1909-1919
外文期刊名:ENVIRONMENTAL SCIENCE & TECHNOLOGY
收录:;EI(收录号:20200508116949);Scopus(收录号:2-s2.0-85078809551);WOS:【SCI-EXPANDED(收录号:WOS:000511508500064)】;
基金:This work was supported by the National Natural Science Foundation of China (51878095) and the Fundamental Research Funds for the Central Universities (2019CDXYCH0026).
语种:英文
外文关键词:Carboxylation - Deionized water - Effluent treatment - Effluents - Electron transitions - Free radical reactions - Manganese compounds - Phenols - Sewage treatment plants - Wastewater treatment
摘要:In this study, a permanganate/redox mediator system for enhanced transformation of a series of emerging contaminants was evaluated. The presence of various redox mediators (i.e., 1-hydroxybenzotriazole, N-hydroxyphthalimide, violuric acid, syringaldehyde, vanillin, 4-hydroxycoumarin, and p-coumaric acid) accelerated the degradation of bisphenol A (BPA) by Mn(VII). Since 1-hydroxybenzotriazole (HBT) exhibited the highest reactive ability, it was selected to further investigate the reaction mechanisms and quantify the effects of important reaction parameters on Mn(VII)/redoX-mediator reactions with BPA and bisphenol AF (BPAF). Interestingly, not only HBT accelerated the degradation of BPA, but also BPA enhanced the decay of HBT. Evidence for the in situ formation of HBT . radicals as the active oxidant responsible for accelerated BPA and BPAF degradation was obtained by radical scavenging experiments and P-31 NMR spin trapping techniques. The routes for HBT radical formation involving Mn(VII) and the electron-transfer pathway from BPA/BPAF to HBT radicals demonstrate that the Mn(VII)/HBT system was driven by the electron-transfer mechanism. Compared to Mn(VII) alone, the presence of HBT totally inhibited self-coupling of BPA and BPAF and promoted beta-scission, hydroxylation, ring opening, and decarboxylation reactions. Moreover, Mn(VII)/HBT is also effective in real waters with the order of river water > wastewater treatment plant (INWTP) effluent > deionized water.
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