中国科学院重庆绿色智能技术研究院机构知识库

QQ客服 官方微博 反馈留言

	An overview of bromate formation in chemical oxidation processes: Occurrence, mechanism, influencing factors, risk assessment, and control strategies
	Yang, Jingxin1; Dong, Zijun3; Jiang, Chengchun3; Wang, Chuan1; Liu, Hong1,2
	2019-12-01
摘要	Chemical oxidation processes have been extensively utilized in disinfection and removal of emerging organic contaminants in recent decades. Some undesired byproducts, however, are produced in these processes. Of them, bromate has attracted the most intensive attention. It was previously regarded as a byproduct that typically occurred in ozone-based oxidation processes. However, for the past decade, bromate formation has been detected in other oxidation processes such as CuO-catalyzed chlorination, SO4 center dot--based oxidation, and ferrate oxidation processes. This review summarizes the occurrences, mechanisms, influencing factors, risk assessment, and control strategies of bromate formation in the four oxidation processes, i.e., ozone-based oxidation, chlorine-based oxidation, SO4 center dot--based oxidation, and ferrate oxidation. Besides, some unresolved issues for future studies are provided: (1) Clarification of the relative contributions of SO4 center dot- and Br center dot to the oxidation of bromine for bromate formation in SO4 center dot--based oxidation processes; (2) evaluation of the role of different reactive species in the bromate formation in the process of UV/HOCl; (3) quantification of the dual role of alkalinity in bromate formation during ozonation; (4) assessment of the risks of bromate formation in SO4 center dot--based oxidation processes for practical applications; and (5) exploration of strategies for inhibiting bromate formation in SO4 center dot--based oxidation, UV/chlorine, and metal oxide-catalyzed chlorination processes. (C) 2019 Published by Elsevier Ltd.
关键词	Bromate Ozone Chlorine Sulfate radicals (SO4 center dot-) Ferrate Hydroxyl radical ((OH)-O-center dot)
DOI	10.1016/j.chemosphere.2019.124521
发表期刊	CHEMOSPHERE
ISSN	0045-6535
卷号	237页码:13
通讯作者	Liu, Hong(liuhong@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000496896700023
语种	英语