Further insights into the combination of permanganate and peroxymonosulfate as an advanced oxidation process for destruction of aqueous organic contaminants
文献类型：期刊论文
| 作者 | Wang, Lihong; Jiang, Jin; Pang, Su-Yon; Gao, Yuan; Zhou, Yang; Li, Juan; Yang, Yi; Ma, Jun; Zhang, Tao |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 228页码:602-610 |
| 关键词 | Permanganate Peroxymonosulfate Manganese dioxide Sulfate and hydroxyl radicals Catalytic mechanism |
| ISSN号 | 0045-6535 |
| 英文摘要 | Recent studies have reported a novel advanced oxidation process (AOP) by combining permanganate (KMnO4) and peroxymonosulfate (PMS) for destruction of organic contaminants (i.e., acid orange 7, trichloroethylene, and benzene), where hydroxyl ('ON) and sulfate radicals (SO4 center dot-) are proposed to be generated from PMS activation by amorphous manganese dioxide (MnO2) formed in situ from KMnO4 reduction. In this work, appreciable degradation of p-chlorobenzoic acid (p-CBA) was confirmed in KMnO4/PMS system, while KMnO4 or PMS alone showed inert reactivity toward p-CBA. Moreover, it was found that pre-synthesized amorphous MnO2 showed invalid PMS activation for p-CBA degradation, and pre-addition of inorganic or organic reducing agents to promote the formation of amorphous Mn02 showed negligible influence on p-CBA degradation as well. In these regards, a tentative mechanism for PMS activation by KMnO4 rather than its product MnO2 was proposed, involving the substitution of oxo atoms of KMnO4 by peroxo groups, subsequent reductive generation of peroxomanganese (VI) complexes, and intramolecular disproportionation of these complexes to generate radicals. Efficient degradation of p-CBA was achieved at acid or basic conditions with a maximum rate occurring at pH 3. The coexisting chloride anions showed suppressive effect on p-CBA degradation for scavenging SO4 center dot- and (OH)-O-center dot, while metal ions accelerated the degradation of p-CBA, possibly due to the cation bridging function between negatively-charged MnOi and HSOE. Hydroxylated intermediates of p-CBA were identified in KMnO4/PMS system. This work improved the fundamental understanding of a new class of AOPs by combining KMnO4 and PMS for environmental decontamination. (C) 2019 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42651]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Guangdong Univ Technol, Inst Environm & Ecol Engn, Guangzhou 510006, Guangdong, Peoples R China 2.Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Environm, Harbin 150090, Heilongjiang, Peoples R China 3.Jilin Jianzhu Univ, Sch Municipal & Environm Engn, Key Lab Songliao Aquat Environm, Minist Educ, Changchun 130118, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lihong,Jiang, Jin,Pang, Su-Yon,et al. Further insights into the combination of permanganate and peroxymonosulfate as an advanced oxidation process for destruction of aqueous organic contaminants[J]. CHEMOSPHERE,2019,228:602-610. |
| APA | Wang, Lihong.,Jiang, Jin.,Pang, Su-Yon.,Gao, Yuan.,Zhou, Yang.,...&Zhang, Tao.(2019).Further insights into the combination of permanganate and peroxymonosulfate as an advanced oxidation process for destruction of aqueous organic contaminants.CHEMOSPHERE,228,602-610. |
| MLA | Wang, Lihong,et al."Further insights into the combination of permanganate and peroxymonosulfate as an advanced oxidation process for destruction of aqueous organic contaminants".CHEMOSPHERE 228(2019):602-610. |
入库方式： OAI收割
来源：生态环境研究中心
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