新疆独山子区VOCs组成及其对O<sub>3</sub>和SOA的贡献

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Abstract

Air samples were collected in the Dushanzi district of Xinjiang Uyghur Autonomous Region, China during the non-heating, heating and sandstorm periods for the analysis of volatile organic compounds (VOCs) by a preconcentrator coupled to a gas chromatography/mass spectrometer according tothe USEPATO-14 standard method. The results showed that group compositions of VOCs in Dushanzi district during the sampling period were ranked in the order ofalkanes (61.80%), alkenes (18.62%), aromatics (10.16%) and acetylene (9.42%). The secondary organic aerosol (SOA) formation potentials of VOCs as estimated by fractional aerosol coefficient (FAC) method revealed that aromatics contributed the most to SOA formation during non-heating, heating and sandstorm period, with contribution percentages of 97.8%, 87.28% and 69.52%, respectively. SPSS software and generalized additive model (GAM) were used to analyze the relationships among meteorological factors, VOCs, O₃ and NO_x. The results demonstrated that high temperature and dry weather were conducive to the formation of O₃. The O₃ formation in Dushanzi district seemed to be VOCs-limited, and alkenes such as 1-butene showed significant linear correlation with O₃.

Key words： VOCs NO_x O₃ secondary organic aerosol Dushanzi district

Received: 15 October 2019

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X511

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	ZHANG Yuan-yu
	WANG Xin-ming
	LIU Xiao-ling
	ZHANG Yan-li
	DILINUER·Talip
	ZHANG Xiao-xiao
	ABULIKEMU·Abulizi
	LIU Wei

Cite this article:

ZHANG Yuan-yu,WANG Xin-ming,LIU Xiao-ling等. Volatile organic compounds (VOCs) in Dushanzi, Xinjiang: Compositions and contributions to the formation of O₃ and SOA[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(5): 1915-1923.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I5/1915

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