深圳臭氧污染日的VOCs组成与来源特征

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Abstract Since volatile organic compounds (VOCs) are the key precursors of O₃ formation, it's important to study on the characteristic and major source of VOCs for controlling O₃ pollution. The research conducted an online VOCs observation from 6^th September to 31^th October in 2019, accounting for 104species was monitored. During the observation, the Over-standard rate of ozone was up to 17.8%. The mixing ratio of TVOCs was about 38.9×10^-9, and polluted period was much higher than non-polluted period. Alkane was the most abundant species at the observation set, followed by OVOC, halohydrocarbon, aromatic, alkene, acetylene and acetonitrile, while aromatic, oxygenated volatile organic compounds (OVOCs) and alkene contributed most for ozone formation potential(OFP). Based on the analysis of PMF source apportionment model, the main sources of VOCs in Shenzhen were biomass burning, gasoline volatilization, vehicle exhaust, industry process and solvent usage, while solvent usage (45.8%) and vehicle exhaust (27.3%) contributed most to the OFP. During the polluted ozone period, weak wind speed may enhance the accumulation of vehicle exhaust and gasoline volatilization source at morning traffic rush time, while the high temperature will also accelerate the evaporation of components in gasoline source and solvent source and promote the photochemical reaction.

Key words： VOCs ozone diurnal variation OFP source apportionment

Received: 04 January 2021

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X511

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	Articles by authors
	LIN Li-liang
	CHENG Yong
	CAO Li-ming
	YU Guang-he
	HUANG Xiao-feng

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LIN Li-liang,CHENG Yong,CAO Li-ming等. The characterization and source apportionment of VOCs in Shenzhen during ozone polluted period[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3484-3492.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I8/3484

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