Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen
文献类型：期刊论文
| 作者 | Duan, Shule ; Dong, Huiyu; Hou, Pin; Han, Gangsheng; Zhang, Bochao; Qiang, Zhimin
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2022 |
| 卷号 | 308页码:136321-1-9 |
| 关键词 | Permanganate Mn(II) Trace organic contaminants Dissolved oxygen Superoxide radical |
| ISSN号 | 0045-6535 |
| 英文摘要 | Permanganate (Mn(VII)) is a widely used oxidant in water treatment, which can oxidize trace organic contaminants (TrOCs) and Mn(II). Interestingly, this study found that presence of Mn(II) could accelerate the abatement of bisphenol A by Mn(VII) only under oxic condition. Herein, the effects of Mn(II) and dissolved oxygen (DO) on the abatement of TrOCs by Mn(VII) oxidation and the related mechanism were investigated. Results indicate that DO was involved in the Mn(VII)/Mn(II) reaction, with the reaction stoichiometry of Delta [Mn(VII)] :Delta[Mn(II)] determined to be 1:2 and 1:1.5 in the presence and absence of DO, respectively. Quenching and electron paramagnetic resonance tests verified that both superoxide radicals (O-2(center dot-)) and reactive Mn species contributed to the accelerated abatement of TrOCs (bisphenol A, methyl phenyl sulfoxide, and methyl phenyl sulfone) in the Mn(VII)/Mn(II) process. Specifically, O-2(center dot-) was produced through the one-electron reduction of DO and made an important contribution (32.4%-100%) to the abatement of selected TrOCs. This study reveals that Mn(II) could enhance TrOC abatement by Mn(VII) oxidation, and DO played a pivotal role in the Mn(VII)/Mn(II) process. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/48576]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.China University of Mining & Technology 2.University of Chinese Academy of Sciences, CAS 3.Chinese Academy of Sciences |
| 推荐引用方式 GB/T 7714 | Duan, Shule,Dong, Huiyu,Hou, Pin,et al. Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen[J]. CHEMOSPHERE,2022,308:136321-1-9. |
| APA | Duan, Shule,Dong, Huiyu,Hou, Pin,Han, Gangsheng,Zhang, Bochao,&Qiang, Zhimin.(2022).Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen.CHEMOSPHERE,308,136321-1-9. |
| MLA | Duan, Shule,et al."Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen".CHEMOSPHERE 308(2022):136321-1-9. |
入库方式： OAI收割
来源：生态环境研究中心
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