深圳市城区VOCs对PM<sub>2.5</sub>和O<sub>3</sub>耦合生成影响研究

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Abstract In order to explore the synergistic characteristics of PM_2.5 and O₃ of the urban atmosphere in PRD region, an enhanced observation of air pollution was performed in autumn, when the photochemical reactions are more active, at Shenzhen university town. The maximum 8hours average of O₃ (O₃_8h) showed strong positive relationship with PM_2.5 and the correlation of O₃_8h with formaldehyde, a typical volatile organic compounds (VOCs), is stronger than that with NO₂. The aerosol mass spectrometer was used to measure the chemical composition of submicron aerosol online. Five types of organic aerosols (OA) were resolved by positive matrix factorization (PMF), of which the secondary organic aerosol (SOA) accounted 50% of the bulk OA. According to the correlation analysis between various pollutants, O₃_8h showed strong correlation with SOA, but no obvious correlation with nitrate (NO₃^-). The correlation analysis demonstrates that VOCs play a more important role than NO_x in the coupling formation process of atmospheric fine particles and O₃ in Shenzhen urban areas, and VOCs emission reduction is the key to collaborative control of PM_2.5 and O₃ pollution in Shenzhen.

Key words： ozone(O₃) fine particle matter (PM_2.5) volatile organic compounds (VOCs) secondary organic aerosol (SOA)

Received: 18 May 2020

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X513

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	Articles by authors
	FENG Ning
	TANG Meng-xue
	LI Meng-lin
	CHEN Yao
	CAO Li-ming
	HE Ling-yan
	HUANG Xiao-feng

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FENG Ning,TANG Meng-xue,LI Meng-lin等. Research on the influence of VOCs on the coupling generation of PM_2.5 and O₃ in Shenzhen[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 11-17.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/11

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