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Temporal variations and source apportionment of volatile organic compounds at an urban site in Shijiazhuang, China

查看全文 作　　者：Yanan [1,2]Guan;Lei [1]Wang;Shujuan [3]Wang;Yihao [1]Zhang;Jieying [1]Xiao;Xiaoli [4]Wang;Erhong [1,2]Duan;Li'an [5]Hou 高影响力作者 机构地区：[1]School of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;[2]National and Local Joint Engineering Center of Volatile Organic Compounds&Odorous Pollution Control Technology,Shijiazhuang 050018,China;[3]Hebei Province Environmental Monitoring Center,Shijiazhuang 050018,China;[4]Hebei Province Environmental Emergency and Heavy Pollution Weather Warning Center,Shijiazhuang 050018,China;[5]Logistics Science and Technology Research Institute of Rocket Army,Beijing 100011,China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2020年第32卷第11期,共10页高影响力期刊 基　　金：supported by the Hebei Provincial Depart-ment of Science and Technology(No.19273711D);the Min-istry of Education of the People’s Republic of China(No.CXZJHZ201717);the Shijiazhuang Science and Technology Bu-reau(No.191240273A,201240363A);the five fund platform projects of Hebei University of Science and Technology(No.1182210);the National Natural Science Foundation of China(No.21776059)。 摘　　要：Shijiazhuang,the city with the worst air quality in China,is suffering from severe ozone pollution in summer.As the key precursors of ozone generation,it is necessary to control the Volatile Organic Compounds(VOCs)pollution.To have a better understanding of the pollution status and source contribution,the concentrations of 117 ambient VOCs were analyzed from April to August 2018 in an urban site in Shijiazhuang.Results showed that the monthly average concentration of total VOCs was 66.27 ppbv,in which,the oxygenated VOCs(37.89%),alkanes(33.89%),and halogenated hydrocarbons(13.31%)were the main composite on.Eight major sources were identified using Positive Matrix Factorization modeling with an accurate VOCs emission inventory as inter-complementary methods revealed that the petrochemical industry(26.24%),other industrial sources(15.19%),and traffic source(12.24%)were the major sources for ambient VOCs in Shijiazhuang.The spatial distributions of major industrial activities emissions were identified by using geographic information statistics system,which illustrated the VOCs was mainly from the north and southeast of Shijiazhuang.The inverse trajectory analysis using Hybrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)and Potential Source Contribution Function(PSCF)clearly demonstrated the features of pollutant transport to Shijiazhuang.These findings can provide references for local governments regarding control strategies to reduce VOCs emissions. 关 键 词：VOCs Source analysis Positive Matrix Factorization(PMF) modeling GIS Inverse trajectory Shijiazhuang
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