气候变化领域集成服务门户(CCPortal): Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China

CCPortal

DOI	10.5194/acp-20-3905-2020
	Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China
	Zhao Q.; Bi J.; Liu Q.; Ling Z.; Shen G.; Chen F.; Qiao Y.; Li C.; Ma Z.
发表日期	2020
ISSN	16807316
起始页码	3905
结束页码	3919
卷号	20 期号:6
英文摘要	Understanding the composition, temporal variability and source apportionment of volatile organic compounds (VOCs) is necessary for determining effective control measures to minimize VOCs and their related photochemical pollution. To provide a comprehensive analysis of VOC sources and their contributions to ozone (O3) formation in the Yangtze River Delta (YRD)-a region experiencing the highest rates of industrial and economic development in China-we conducted a 1-year sampling exercise using a thermal desorption GC (gas chromatography) system for the first time at an urban site in Nanjing (JAES site). Alkanes were the dominant group at the JAES site, contributing ∼ 53 % to the observed total VOCs, followed by aromatics (∼ 17 %), acetylene (∼ 17 %) and alkenes (∼ 13 %). We identified seasonal variability in total VOCs (TVOCs) with maximum and minimum concentrations in winter and summer, respectively. Morning and evening peaks and a daytime trough were identified in the diurnal VOC patterns. We identified VOC sources using positive matrix factorization (PMF) and assessed their contributions to photochemical O3 formation by calculating the O3 formation potential (OFP) based on the mass concentrations and maximum incremental reactivities of VOCs. The PMF model identified five dominant VOC sources, with highest contributions from diesel vehicular exhaust (34 ± 5 %), followed by gasoline vehicular exhaust (27 ± 3 %), industrial emissions (19 ± 2 %), fuel evaporation (15±2 %) and biogenic emissions (4±1 %). The results of the OFP calculation inferred that VOCs from industrial and vehicular emissions were found to be the dominant precursors for OFP, particularly the VOC species of xylenes, toluene and propene, and top priority should be given to these for the alleviation of photochemical smog. Our results therefore highlight that priority should be given to limited VOC sources and species for effective control of O3 formation in Nanjing. © 2020 Author(s).
关键词	alkane atmospheric pollution desorption ozone pollutant source pollution control seasonal variation traffic emission urban area volatile organic compound China Jiangsu Nanjing [Jiangsu]Yangtze River
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132125
推荐引用方式 GB/T 7714	Zhao Q.,Bi J.,Liu Q.,et al. Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China[J]. Atmospheric Chemistry and Physics,2020,20(6).
APA	Zhao Q..,Bi J..,Liu Q..,Ling Z..,Shen G..,...&Ma Z..(2020).Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China.,20(6).
MLA	Zhao Q.,et al."Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China".20.6(2020).