气候变化领域集成服务门户(CCPortal): VOC characteristics, chemical reactivity and sources in urban Wuhan, central China

CCPortal

DOI	10.1016/j.atmosenv.2020.117340
	VOC characteristics, chemical reactivity and sources in urban Wuhan, central China
	Hui L.; Liu X.; Tan Q.; Feng M.; An J.; Qu Y.; Zhang Y.; Deng Y.; Zhai R.; Wang Z.
发表日期	2020
ISSN	13522310
卷号	224
英文摘要	This paper presents the pollution levels, variation characteristics, chemical reactivity, source apportionment and potential source regions of 102 volatile organic compounds (VOCs) observed from 2017.4.26 to 2017.6.6 in urban Wuhan. The concentration of total VOCs (TVOCs) was 28.92 ± 20.10 ppbv, and the VOC composition was dominated by alkanes (51.14%). Propane, ethane and acetone were the most abundant VOC species. The results for the OH radical loss rate (LOH) and ozone formation potential (OFP) indicated that alkenes were responsible for much of the chemical reactivity and O3 formation, accounting for 47.02% and 49.52%, respectively, and the dominant VOC species were mainly associated with anthropogenic sources, such as vehicle emissions, the use of natural gas (NG) and liquefied petroleum gas (LPG), solvent usage and fuel evaporation. Ambient ratio data showed that VOCs were greatly affected by the pollution sources (such as emissions of NG and LPG, liquid gasoline and fuel evaporation sources, vehicle exhaust emissions, and biogenic sources), photochemical reaction processes and regional transport. Industrial sources (11.84%), industrial sources + coal burning (13.09%), LPG/NG usage + solvent usage in painting/coating (37.28%), fuel evaporation (12.04%), vehicle exhaust (13.65%), biogenic sources (5.95%) and biomass burning (6.15%) were determined by positive matrix factorization (PMF). Furthermore, LPG/NG usage, solvent usage in painting/coating and vehicle exhaust were the most important VOC sources, and their various contributions were affected by a combination of factors, including the emission strength of pollution sources, meteorological conditions and photochemical reaction processes. Backward trajectory analysis showed that VOC pollution was mainly derived from the south via short-distance transport. The potential source contribution function (PSCF) results indicated that the main sources affecting VOC pollution were the potential sources to the south and local sources within the city. This study provides evidence for local governments to formulate VOC control strategies during the transition from spring to summer. © 2020 Elsevier Ltd
英文关键词	Ambient ratios; Chemical reactivity; PSCF; Source apportionment; Volatile organic compounds
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120709
作者单位	State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China; Chengdu Academy of Environmental Sciences, Chengdu, 610072, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Yuncheng Municipal Ecological Environment Bureau, Yuncheng, 044000, China
推荐引用方式 GB/T 7714	Hui L.,Liu X.,Tan Q.,et al. VOC characteristics, chemical reactivity and sources in urban Wuhan, central China[J],2020,224.
APA	Hui L..,Liu X..,Tan Q..,Feng M..,An J..,...&Wang Z..(2020).VOC characteristics, chemical reactivity and sources in urban Wuhan, central China.Atmospheric Environment,224.
MLA	Hui L.,et al."VOC characteristics, chemical reactivity and sources in urban Wuhan, central China".Atmospheric Environment 224(2020).