Characteristics of atmospheric volatile organic compounds in urban area of Beijing: Variations, photochemical reactivity and source apportionment

作     者：Lihui Zhang Hong Li Zhenhai Wu Weiqi Zhang Kankan Liu Xi Cheng Yujie Zhang Bin Li Yizhen Chen Lihui Zhang;Hong Li;Zhenhai Wu;Weiqi Zhang;Kankan Liu;Xi Cheng;Yujie Zhang;Bin Li;Yizhen Chen

作者机构：State Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of Environmental SciencesBeijing 100012China School of Environment and Safety EngineeringNorth University of ChinaTaiyuan 030051China Collaborative Innovation Center on Atmospheric Environment and Equipment TechnologyNanjing University of Information Science and TechnologyNanjing 210044China Shenhua Group Zhungeer Energy Co.LtdGangue Power CompanyOrdos 017100China 

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

年 卷 期：2020年第32卷第9期

页      面：190-200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）] 07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by Central Level,Scientific Research Institutes for Basic R&D Special Fund Business,China(Nos.2016-YSKY-026 and 2016-YSKY-002) National Research Program for Key Issue in Air Pollution Control(No.DOGG030405) the National Natural Science Foundation of China(No.21707125) 

主　　题：volatile source winter 

摘      要：Atmospheric volatile organic compounds(VOCs)were observed by an on-line gas chromatography-flame ionization detector monitoring system from November 2016 to August 2017 in *** average concentrations were winter(40.27±25.25μg/m3)autumn(34.25±19.90μg/m3)summer(32.53±17.39μg/m3)spring(24.72±17.22μg/m3).Although benzene(15.70%),propane(11.02%),ethane(9.32%)and n-butane(6.77%)were the most abundant species,ethylene(14.07%)and propene(11.20%)were the key reactive species to ozone formation potential(OFP),and benzene,toluene,ethylbenzene,mxylene+p-xylene and o-xylene(54.13%)were the most reactive species to secondary organic aerosol formation potential(SOAFP).The diurnal and seasonal variations indicated that diesel vehicle emission during early morning,gasoline vehicle emission at the traffic rush hours and coal burning during the heating period might be important *** major sources were further identified by positive matrix factorization(PMF).The vehicle exhaust(gasoline exhaust and diesel exhaust)was found to be contributed most to atmospheric VOCs,with 43.59%,41.91%,50.45%and 43.91%,respectively in spring,summer,autumn and winter;while solvent usage contributed least,with 11.10%,7.13%,14.00%and 19.87%,*** emission sources(13.11%)were only identified in ***,both vehicle exhaust and solvent usage were identified to be the key sources considering contributions to the OFP and ***,the contributions of combustion during heating period and gasoline evaporation source during warm seasons to OFP and SOAFP should not be overlooked.