南宁市冬季挥发性有机物特征及其来源分析

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Abstract In order to explore the characteristics and sources of volatile organic compounds (VOCs) pollution in winter, an online continuous monitoring system was used to conduct continuous observation of 116 VOCs in Nanning urban area from December 9, 2020 to February 22, 2021. The results show that the total volume fraction of VOCs was 37.57×10^-9, of which alkanes, olefins, aromatic hydrocarbons, OVOCs and halogenated hydrocarbons accounted for 44%, 15%, 8%, 19% and 11%, respectively, generally being low in the daytime and high at night. In view of the OH radical loss rate (L_OH) and ozone formation potential (OFP), aldehydes and ketones, aromatic hydrocarbons and olefins were thought to be the main active substances. And aromatic hydrocarbons contributed 98% to the generation of secondary organic aerosols (SOA), of which benzene, m/p-xylene and toluene were the dominant species. Then, VOCs mainly derived from the sources in the order as:vehicle exhaust emissions (30.1%) > stationary combustion and biomass combustion (22.2%) > industrial process emissions (16.8%); while the sources with higher OFP contribution were solvent usee (23.9%), stationary- and biomass combustion (22%), and vehicle exhaust emissions (21.8%). Therefore, the priority for controlling VOCs sources in Nanning winter should be firstly placed on the vehicle exhaust emissions and the stationary- and biomass combustion, followed by industrial process emission sources and solvent use sources.

Key words： Nanning volatile organic compounds (VOCs) ozone formation potential (OFP) PMF analysis source identification

Received: 26 January 2022

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X513

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	Articles by authors
	LU Jia-hui
	WU Ying
	LIU Hui-lin
	MO Zhao-yu
	REN Quan-ming
	HUANG Xi-shou
	HUANG Jiong-li
	YAN Shi-yang
	SONG Ling-he

Cite this article:

LU Jia-hui,WU Ying,LIU Hui-lin等. Characteristics and sources of volatile organic compounds (VOCs) in winter over Nanning of China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(8): 3616-3625.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I8/3616

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