广州市夏季VOCs对臭氧及SOA生成潜势的研究

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Abstract Online monitoring of atmospheric volatile organic compounds (VOCs) was performed at an urban site in Guangzhou for 27 days.A total of 73VOC species were detected with an average concentration of 40.07×10^-9 during the period,and the average proportions of alkane,aromatic,alkene,chlorinated hydrocarbon,acetylene,OVOC,acetonitrile were 55.17%,15.42%,12.14%,8.79%,3.97%,3.72%,0.79%,respectively.The ozone formation potential (OFP) and the OH radical loss rate were applied to assess chemical reactivity of VOCs.The results showed that aromatics and alkenes were the most active components in atmosphere,including toluene,trans-2-pentene,m/p-xylene,1,3-butadiene,isoprene,etc.Fractional aerosol coefficients (FAC) was used to estimate the potential formation of secondary organic aerosol (SOA).The results showed that aromatics,alkanes and alkenes,contributed 95.54%,2.5% and 1.95% to the total SOA formation potential,respectively.Toluene,m/p-xylene,ethylbenzene,o-xylene,1,2,4-trimethylbenzene were the top 5 largest contributors to SOA production.

Key words： volatile organic compounds ozone formation potential secondary organic aerosol

Received: 17 August 2017

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	Articles by authors
	YU Xiao-fang
	CHENG Peng
	GU Ying-gang
	LI Mei
	TIAN Zhi-lin

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YU Xiao-fang,CHENG Peng,GU Ying-gang等. Formation potential of ozone and secondary organic aerosol from VOCs oxidation in summer in Guangzhou, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(3): 830-837.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I3/830

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