Atmospheric gaseous aromatic hydrocarbons in eastern China based on mobile measurements:Spatial distribution,secondary formation potential and source apportionment

作     者：Lingling Yuan Hongli Wang Yaqin Gao Guofa Ren Yiqun Lu Shengao Jing Wen Tan Liang Zhu Yu Shang Jing An Cheng Huang Lingling Yuan;Hongli Wang;Yaqin Gao;Guofa Ren;Yiqun Lu;Shengao Jing;Wen Tan;Liang Zhu;Yu Shang;Jing An;Cheng Huang

作者机构：Institute of Environmental Pollution and HealthSchool of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China State of Environmental Protection Key Laboratory of Formation and Prevention of Urban Air ComplexShanghai Academy of Environmental SciencesShanghai 200233China Tofwerk ChinaNanjing 210000China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第130卷第8期

页      面：102-113页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1002[医学-临床医学] 07[理学] 1001[医学-基础医学(可授医学、理学学位)] 070602[理学-大气物理学与大气环境] 0804[工学-仪器科学与技术] 0706[理学-大气科学] 0703[理学-化学] 0835[工学-软件工程] 

基　　金：supported by the National Natural Science Foundation of China(No.42175135) the Science and Technology Commission of the Shanghai Municipality(No.20ZR1447800). 

主　　题：Monocyclic/polycyclic aromatics Spatial distribution Source apportionment Eastern China Mobile measurements 

摘      要：Monocyclic aromatic hydrocarbons(MAHs)and polycyclic aromatic hydrocarbons(PAHs)are both well known as hazardous air pollutants and also important anthropogenic precursors of tropospheric ozone(O3)and secondary organic aerosols(SOA).In recent years,there have been intensive studies covering MAHs emission from various sources and their behavior under stimulated photochemical conditions.Yet in-situ measurements of PAHs presence and variations in ambient air are sparse.Herein we conducted large geometrical scale mobile measurements for 16 aromatic hydrocarbons(AHs,including 7 MAHs and 9 PAHs)in eastern China between October 27 and November 8,2019.This unique dataset has allowed for some insights in terms of AHs concentration variations,accompanying chemical composition,source contributions and spatial distributions in eastern China.In general,AHs showed a clear concentration variability between the south and the north of the Yangtze River Delta(YRD).The concentrations of PAHs were approximately 9%of AHs,but contributed 23%of SOA formation potential.Source apportionment via positive matrix factorization(PMF)model revealed that industrial processes as the largest source(44%)of observed AHs,followed by solvent usage(21%),vehicle exhaust(19%),coal combustion(11%)and coking processes(6%).In the perspective of PAHs sources,coal combustion emissions were identified as the dominating factor of a share of 41%–52%in eastern China.Our findings complemented the simultaneously monitoring information of PAHs and MAHs in eastern China,revealed the importance of PAHs to SOA formation and highlighted the necessity of formulating strategies to reduce emissions from anthropogenic sources and reduce risks to human health.