Environmental and health risks of VOCs in the longest inner-city tunnel in Xi & rsquo;an, Northwest China: Implication of impact from new energy vehicles

doi:10.1016/j.envpol.2021.117057

IEECAS OpenIR > 粉尘与环境研究室

	Environmental and health risks of VOCs in the longest inner-city tunnel in Xi & rsquo;an, Northwest China: Implication of impact from new energy vehicles
	Xu, Hongmei 1,2; Feng, Rong 1; Wang, Zexuan 1; Zhang, Ningning 2; Zhang, Renjian 3; He, Kailai 1; Wang, Qiyuan 2; Zhang, Qian 4; Sun, Jian 1; Zhang, Bin 1; Shen, Zhenxing 1,2; Ho, Steven Hang Sai 5; Cao, Junji 2
通讯作者	Xu, Hongmei(xuhongmei@xjtu.edu.cn)
	2021-08-01
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
卷号	282 页码:9
摘要	Traffic source-dominated volatile organic compound (VOC) samples were collected during four time-intervals in a day (I: 7:30-10:30, II: 11:00-14:0 0, III: 16:30-19:30, and IV: 20:00-23:0 0) in a tunnel in summer, 2019, in Xi & rsquo;an, China. The total measured VOC (TVOC) in periods I and III (rush hours, 107.2 +/- 8.2 parts per billion by volume [ppbv]) was 1.8 times that in periods II and IV (non-rush hours, 58.6 +/- 13.8 ppbv), consistent with the variation in vehicle numbers in the tunnel. The considerably elevated ethane and ethylbenzene levels could have been attributed to emissions from compressed natural gas vehicles and the rapid development of methanol-fueled taxis in Xi & rsquo;an in 2019. The mixing ratios of benzene, toluene, ethylbenzene, and xylenes (BTEX) contributed 9.4%-12.7% to TVOCs, and the contributions were nearly 40% higher in periods I and III than in II and IV, indicating that BTEX levels were strongly affected by vehicle emissions. The indicators of motor vehicle emission, namely ethylene, propylene, toluene, m/p-xylenes, o-xylene, and propane, contributed to more than half of the ozone formation potential in this study. The noncarcinogenic risks of VOCs in this study were within the in-ternational safety standard, whereas the carcinogenic risks exceeded the standard by 2.3-4.6 times, suggesting that carcinogenic risks were more serious than noncarcinogenic risks. VOCs presented 2.2 and 1.4 times noncarcinogenic and carcinogenic risks during rush hours than during non-rush hours, respectively. Notably, the carcinogenic risk in period IV was comparable with that in period III; however, the vehicle numbers and VOC mixing ratios were the lowest at night, which may have attributed to the increasing number and proportion of methanol M100-fueled vehicles in the tunnel. Therefore, VOCs emitted by new energy vehicles should also be seriously considered while evaluating fossil fuel vehicle emissions. (c) 2021 Elsevier Ltd. All rights reserved.
关键词	VOCs Tunnel Methanol-fueled vehicles BTEX OFP Health risk
DOI	10.1016/j.envpol.2021.117057
关键词[WOS]	VOLATILE ORGANIC-COMPOUNDS ; POLYCYCLIC AROMATIC-HYDROCARBONS ; GASOLINE PASSENGER CARS ; ON-ROAD MEASUREMENTS ; EMISSION FACTORS ; VEHICULAR EMISSION ; SAO-PAULO ; HONG-KONG ; EXHAUST ; TRENDS
收录类别	SCI ; SCI
语种	英语
资助项目	Key Research and Development Program of Shaanxi Province[2018-ZDXM3-01] ; Key Research and Development Program of Shaanxi Province[2018ZDCXL-SF-02-05] ; National Natural Science Foundation of China[41877376] ; National Natural Science Foundation of China[41907188]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	Key Research and Development Program of Shaanxi Province ; National Natural Science Foundation of China
WOS类目	Environmental Sciences
WOS记录号	WOS:000660292100005
出版者	ELSEVIER SCI LTD
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16775
专题	粉尘与环境研究室
通讯作者	Xu, Hongmei
作者单位	1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, SKLLQG, Xian 710061, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing 100029, Peoples R China 4.Xian Univ Architecture & Technol, Key Lab Northwest Resource Environm & Ecol, MOE, Xian 710055, Peoples R China 5.Desert Res Inst, Div Atmospher Sci, Reno, NV USA
推荐引用方式 GB/T 7714	Xu, Hongmei,Feng, Rong,Wang, Zexuan,et al. Environmental and health risks of VOCs in the longest inner-city tunnel in Xi & rsquo;an, Northwest China: Implication of impact from new energy vehicles[J]. ENVIRONMENTAL POLLUTION,2021,282:9.
APA	Xu, Hongmei.,Feng, Rong.,Wang, Zexuan.,Zhang, Ningning.,Zhang, Renjian.,...&Cao, Junji.(2021).Environmental and health risks of VOCs in the longest inner-city tunnel in Xi & rsquo;an, Northwest China: Implication of impact from new energy vehicles.ENVIRONMENTAL POLLUTION,282,9.
MLA	Xu, Hongmei,et al."Environmental and health risks of VOCs in the longest inner-city tunnel in Xi & rsquo;an, Northwest China: Implication of impact from new energy vehicles".ENVIRONMENTAL POLLUTION 282(2021):9.