Distribution and regeneration of hydroxyl free radicals in gaseous and particulate phases of pollutants in near-ground ambient air

doi:10.1016/j.scitotenv.2019.05.300

IR > 石油化工学院

	Distribution and regeneration of hydroxyl free radicals in gaseous and particulate phases of pollutants in near-ground ambient air
	Wang, Guoying; Yu, Jianglei; Su, Ying; Shi, Gaofeng
	2019-09-15
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	683 页码:221-230
摘要	Hydroxyl free radicals play the main role in atmospheric oxidative capacity. The formation of secondary fine particulate matter and the degradation of gaseous pollutants in the troposphere are dominated by hydroxyl free radical reactions. The harmful effect of particulate matters to human health is closely related to the free radicals distributed in the particulate matter phase. In this paper, the distribution of hydroxyl free radicals in near-ground ambient air was studied. The hydroxyl free radicals exist not only in the gaseous phase but also in the particulate phase, especially during heavy haze pollution. It is noteworthy that the concentration of hydroxyl free radicals in the particulate phase is about two times higher than that in the gaseous phase. The possible regeneration mechanisms are proposed. The excited electrons (e(-)) and holes (h(+)) formed e(-) - h(+) pairs in particulate matters are identified to play a key role in promoting the regeneration of hydroxyl free radicals in particulate phase. Environmentally persistent free radicals in particulate phase could also further promote the chain reaction of free radicals and ultimately result in explosive regeneration in an environment that has been excited. The correlation between radical concentrations in gas species, particulate phases and particulate number concentration has been summary based on the actual monitoring site including Thermal power plant, Yumen street and Chemical street sites. (C) 2019 Published by Elsevier B.V.
关键词	Hydroxyl free radicals Regeneration and distribution Gaseous phase Particulate phase Pollutants in near-ground ambient air
DOI	10.1016/j.scitotenv.2019.05.300
收录类别	SCI ; SCIE
语种	英语
资助项目	National Key Research and Development Program of China[2016YFC0202900] ; National Natural Science Foundation of China[21567015][21407072] ; Natural Science Foundation of Gansu Province[17JR5RA109] ; Gansu Provincial Party Committee Young Creative Talents[Ganzutongzi[2017]121]
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000471657600025
出版者	ELSEVIER SCIENCE BV
EI入藏号	20192206981579
EI主题词	Particles (particulate matter)
EI分类号	443.1 Atmospheric Properties - 615.4 Thermoelectric Energy - 802.2 Chemical Reactions - 951 Materials Science
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/31569
专题	石油化工学院
通讯作者	Shi, Gaofeng
作者单位	Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou, Gansu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Wang, Guoying,Yu, Jianglei,Su, Ying,et al. Distribution and regeneration of hydroxyl free radicals in gaseous and particulate phases of pollutants in near-ground ambient air[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,683:221-230.
APA	Wang, Guoying,Yu, Jianglei,Su, Ying,&Shi, Gaofeng.(2019).Distribution and regeneration of hydroxyl free radicals in gaseous and particulate phases of pollutants in near-ground ambient air.SCIENCE OF THE TOTAL ENVIRONMENT,683,221-230.
MLA	Wang, Guoying,et al."Distribution and regeneration of hydroxyl free radicals in gaseous and particulate phases of pollutants in near-ground ambient air".SCIENCE OF THE TOTAL ENVIRONMENT 683(2019):221-230.

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