Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen

	Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen
	Duan, Shule; Dong, Huiyu; Hou, Pin ; Han, Gangsheng ; Zhang, Bochao ; Qiang, Zhimin
	2022
Source Publication	CHEMOSPHERE
ISSN	0045-6535
Volume	308 Pages:136321-1-9
Abstract	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.
Department	中国科学院饮用水科学与技术重点实验室
Keyword	Permanganate Mn(II) Trace organic contaminants Dissolved oxygen Superoxide radical
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/48576
Collection	中国科学院饮用水科学与技术重点实验室
Affiliation	1.Chinese Academy of Sciences 2.University of Chinese Academy of Sciences, CAS 3.China University of Mining & Technology
Recommended Citation 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.

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