Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing

doi:10.1016/j.scitotenv.2020.137934

	Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing
	Zhang, Yanli 2,3,4; Deng, Wei 2,3; Hu, Qihou 1,2,3; Wu, Zhenfeng 2,3,5; Yang, Weiqiang 2,3; Zhang, Huina 2,3,5; Wang, Zhaoyi 2,3; Fang, Zheng 2,3; Zhu, Ming 2,3,5; Li, Sheng 2,3,5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-06-20
卷号	722
关键词	Gasoline vehicle exhaust Non-methane hydrocarbons Secondary organic aerosol Chamber simulation Photochemical ageing China
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.137934
通讯作者	Wang, Xinming(wangxm@gig.ac.cn)
英文摘要	Driving conditions are among the important factors determining gasoline vehicle emissions, yet their relation with exhaust-derived secondary pollutants is poorly understood. Here, we introduced exhaust from a gasoline vehicle under hot idling and cruising conditions into an indoor smog chamber by using a chassis dynamometer and investigated the formation of secondary organic aerosols (SOA) during photochemical ageing under light after characterizing the primary emission of non-methane hydrocarbons (NMHCs), nitrogen oxide (NOx) and primary organic aerosol (POA) in the dark. When compared to emission factors (EFs) at idling, during cruising at 20 km h(-1) or 40 km h(-1), the EFs of NMHCs decreased by more than an order of magnitude, while the EFs of NOx were more than doubled, resulting in a large drop in the NMHC-to-NOx ratios. The percentages of reactive alkenes and aromatic hydrocarbons also decreased from idling to cruising at 20 km h-1 to that at 40 km h(-1). The emission factor of benzene, a carcinogenic compound, decreased more than 10 times from similar to 0.35 g kg fuel(-1) at idling to similar to 0.03 g kg-fuel(-1) during cruising. During photochemical ageing of exhaust, substantial SOA was formed, and the SOA/POA ratios decreased from 52 to 92 at idling to 4-14 during cruising. Traditional aromatics could explain 30-64% of the measured SOA at idling but less than 15% of the measured SOA during cruising. Our results highlight that traffic congestion would greatly promote the emission of reactive volatile organic compounds and carcinogenic benzene from gasoline vehicles and also show that NMHCs as a target in gasoline vehicle emission tests cannot effectively represent the SOA and ozone formation potentials of the partially oxidized hydrocarbons from poorly functioning converters. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Key Research and Development Program[2017YFC0212802/2016YFC0202204] ; Chinese Academy of Sciences[QYZDJ-SSW-DQC032/XDA23020301/XDA23010303] ; National Natural Science Foundation of China[41673116/41530641/41571130031] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017406] ; Guangdong Foundation for Program of Science and Technology Research[2017B030314057]
WOS关键词	RADICAL-INITIATED REACTIONS ; NITROGEN-OXIDE EMISSIONS ; PEARL RIVER DELTA ; ON-ROAD GASOLINE ; AROMATIC-HYDROCARBONS ; DIESEL VEHICLES ; IN-USE ; COMPOUND EMISSIONS ; CYCLIC ALKANES ; SMOG CHAMBER
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000535720500012
资助机构	National Key Research and Development Program ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Guangdong Foundation for Program of Science and Technology Research
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103235]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Xinming
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Ut, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yanli,Deng, Wei,Hu, Qihou,et al. Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,722.
APA	Zhang, Yanli.,Deng, Wei.,Hu, Qihou.,Wu, Zhenfeng.,Yang, Weiqiang.,...&Wang, Xinming.(2020).Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing.SCIENCE OF THE TOTAL ENVIRONMENT,722.
MLA	Zhang, Yanli,et al."Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing".SCIENCE OF THE TOTAL ENVIRONMENT 722(2020).