Chemical characteristics of size-resolved aerosols in winter in Beijing

查看全文 作　　者：Kang [1,2]Sun;Yu [3]Qu;Qiong [1]Wu;Tingting [1]Han;Jianwei [4]Gu;Jingjing [5]Zhao;Yele [3]Sun;Qi [3]Jiang;Ziqi [6]Gao;Min [2]Hu;Yuanhang [2]Zhang;Keding [2]Lu;Stephan [7]Nordmann;Yafang [2]Cheng;Li [8]Hou;Hui [8]Ge;Masami [8]Furuuchi;Mitsuhiko [8]Hata;Xingang [1]Liu

机构地区：[1]State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University;[2]College of Environmental Sciences and Engineering,Peking University;[3]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences;[4]Environmental Science Center,University of Augsburg;[5]School of Foreign Languages,China University of Political Science and Law;[6]School of Chemistry,Beijing Normal University;[7]Multiphase Chemistry Department,Max Planck Institute for Chemistry;[8]Laboratory of Atmospheric Environment and Pollution Control Engineering,Graduate School of Natural Science & Technology,Kanazawa University

出　　处：《Journal of Environmental Sciences》索引2014年第26卷第8期,共10页

基　　金：supported by the National Natural Science Foundation of China (No.41175018);the Ministry of Science and Technology of China (No.2013CB955804);the special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control (Nos.13Z02ESPCP and 13K04ESPCP) 摘　　要：Size-resolved aerosols were continuously collected by a Nano Sampler for 13 days at an urban site in Beijing during winter 2012 to measure the chemical composition of ambient aerosol particles. Data collected by the Nano Sampler and an ACSM(Aerodyne Aerosol Chemical Speciation Monitor) were compared. Between the data sets,similar trends and strong correlations were observed,demonstrating the validity of the Nano Sampler. PM10 and PM2.5concentrations during the measurement were 150.5 ± 96.0 μg/m3(mean ± standard variation)and 106.9 ± 71.6 μg/m3,respectively. The PM2.5/PM10 ratio was 0.70 ± 0.10,indicating that PM2.5dominated PM10. The aerosol size distributions showed that three size bins of 0.5–1,1–2.5 and 2.5–10 μm contributed 21.8%,23.3% and 26.0% to the total mass concentration(TMC),respectively. OM(organic matter) and SIA(secondary ionic aerosol,mainly SO42-,NO3-and NH4+) were major components of PM2.5. Secondary compounds(SIA and secondary organic carbon) accounted for half of TMC(about 49.8%) in PM2.5,and suggested that secondary aerosols significantly contributed to the serious particulate matter pollution observed in winter. Coal burning,biomass combustion,vehicle emissions and SIA were found to be the main sources of PM2.5. Mass concentrations of water-soluble ions and undetected materials,as well as their fractions in TMC,strikingly increased with deteriorating particle pollution conditions,while OM and EC(elemental carbon) exhibited different variations,with mass concentrations slightly increasing but fractions in TMC decreasing. 关键词：气溶胶颗粒化学特征北京生物质燃烧冬天可吸入颗粒物质量浓度汽车尾气排放

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Chemical characteristics of size-resolved aerosols in winter in Beijing

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