Peroxymonosulfate enhanced photoelectrocatalytic oxidation of organic contaminants and simultaneously cathodic recycling of silver

	Peroxymonosulfate enhanced photoelectrocatalytic oxidation of organic contaminants and simultaneously cathodic recycling of silver
	Shao, Huixin; Li, Xia ; Zhang, Juanjuan; Zhao, Xu
	2022
Source Publication	JOURNAL OF ENVIRONMENTAL SCIENCES
ISSN	1001-0742
Volume	120 Pages:1-10
Abstract	Degradation of organic contaminants with simultaneous recycling of Ag + from silvercontaining organic wastewater such as photographic effluents is desired. Although photoelectrocatalysis (PEC) technology is a good candidate for this type of wastewater, its reaction kinetics still needs to be improved. Herein, peroxymonosulfate (PMS) was employed to enhance the PEC kinetics for oxidation of phenol (PhOH) at the anode and reduction of Ag + at the cathode. The degradation efficiency of phenol (PhOH, 0.1 mmol/L) was increased from 42.8% to 96.9% by adding 5 mmol/L PMS at a potential of 0.25 V. Meanwhile, the Ag (by wt%) deposited on the cathode was 28.1% (Ag 2 O) in PEC process, while that of Ag (by wt%) was 69.7% (Ag 0 ) by adding PMS. According to the electrochemistry analysis, PMS, as photoelectrons acceptor, enhances the separation efficiency of charges and the direct h + oxidation of PhOH at the photoanode. Meantime, the increasing cathode potential avoided H 2 evolution and strongly alkaline at the surface of cathode, thus enabling the deposition of Ag + in the form of metallic silver with the help of PMS. In addition, PMS combined with PEC process was effective in treating photographic effluents. ?? 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
Department	中国科学院饮用水科学与技术重点实验室
Keyword	Peroxymonosulfate Photoelectrocatalysis Organic contaminants degradation Silver recycling Photographic effluents
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/48569
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.Research Center for Eco-Environmental Sciences (RCEES) 3.University of Chinese Academy of Sciences, CAS 4.Tongji University
Recommended Citation GB/T 7714	Shao, Huixin,Li, Xia,Zhang, Juanjuan,et al. Peroxymonosulfate enhanced photoelectrocatalytic oxidation of organic contaminants and simultaneously cathodic recycling of silver[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2022,120:1-10.
APA	Shao, Huixin,Li, Xia,Zhang, Juanjuan,&Zhao, Xu.(2022).Peroxymonosulfate enhanced photoelectrocatalytic oxidation of organic contaminants and simultaneously cathodic recycling of silver.JOURNAL OF ENVIRONMENTAL SCIENCES,120,1-10.
MLA	Shao, Huixin,et al."Peroxymonosulfate enhanced photoelectrocatalytic oxidation of organic contaminants and simultaneously cathodic recycling of silver".JOURNAL OF ENVIRONMENTAL SCIENCES 120(2022):1-10.

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