基于聚类分析的长治市夏季VOCs来源及活性

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Abstract To better understand sources and characteristics of volatile organic compounds (VOCs) pollution in Changzhi, a set of air samples were collected in summer 2017 to study the concentration and chemical reactivity (in the rate of OH radical loss) on ozone generation, and to identify anthropogenic sources of VOCs based on clustering analysis and positive matrix factorization model (PMF). Results revealed that the average concentration and chemical reactivity of total VOCs was 37.40μg/m³ and 5.07s^-1, respectively, with the mixing characteristic of the local fresh emissions and aged air masses after oxidation reaction. Five major anthropogenic sources of VOCs with their contribution were identified by PMF: vehicles exhaust (29.7%), coal combustion (29.2%), liquefied petroleum gas/natural gas (LPG/NG) usage (23.5%), industrial processes (11.6%), and solvent usage (6.1%). For fresh emissions, the contribution shares became 34.6%, 38.4%, 10.1%, 8.5%, and 8.5%, respectively. The results suggested that VOCs in Changzhi mainly came from local vehicles exhaust and coal combustion, but LPG/NG usage and industrial processes in neighboring regions could also influence local VOCs via regional transportation processes. Thus, to effectively control the local VOCs emission, a joint prevention and control effort of LPG/NG usage and industrial processes in the neighboring urban area around Changzhi is needed in addition of regulating local vehicles and coal combustion.

Key words： volatile organic compounds summertime source apportionment clustering chemical reactivity

Received: 07 January 2020

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X511

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	Articles by authors
	LI Ru-mei
	YAN Yu-long
	DUAN Xiao-lin
	WANG Fang-yuan
	NIU Yue-yuan
	WANG Cheng
	XU Yang
	LI Ying-hui
	HU Dong-mei
	FAN Zhan-chun
	LI Huang-feng
	PENG Lin

Cite this article:

LI Ru-mei,YAN Yu-long,DUAN Xiao-lin等. Source apportionment and chemical reactivity of VOCs based on clustering during summertime in Changzhi[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3249-3259.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I8/3249

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