Characterization and source identification of submicron aerosol dur ing ser ious haze pollution periods in Beijing

作     者：Peng Xu Yuan Yang Junke Zhang Wenkang Gao Zirui Liu Bo Hu Yuesi Wang Peng Xu;Yuan Yang;Junke Zhang;Wenkang Gao;Zirui Liu;Bo Hu;Yuesi Wang

作者机构：State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC)Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Resource and Environmental EngineeringGuizhou UniversityGuiyang 550025GuizhouChina Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong UniversityChengdu 611756China University of the Chinese Academy of SciencesBeijing 100049China 

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

年 卷 期：2022年第34卷第2期

页      面：25-37页

核心收录：

学科分类：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 the Ministry of Science and Technology of China(No.2017YFC0210000) the Science and Technology Planned Project in Guizhou Province(Qian Kehe Foundation1Y175) the Introducing Talent in Guizhou University(2018) 

主　　题：Haze pollution Submicron aerosol Source apportionment PAHs Organic and inorganic nitrate 

摘      要：Submicron aerosol is of extensive concern not only due to its significant impact on air quality but also because it is detrimental to human *** this study,we investigated the characteristics,sources and chemical processes of submicron aerosol based on realtime online measurements of submicron aerosols(NR-PM 1)during December 2015 at an urban site in *** average mass concentration of NR-PM 1 was 92.5±84.9μg/m^(3),the hourly maximum was 459.1μg/m^(3) during the entire *** organic aerosol(OA)(55%)was the largest contributor to NR-PM *** average mass concentration of PAHs was 0.217±0.247μg/m^(3),exhibiting the highest concentration at night and the lowest levels in the *** average mass concentration of organic nitrate was 2.52±2.36μg/m^(3) and that of inorganic nitrate was 7.62±8.22μg/m^(3),accounting for 36%and 64%,respectively,of the total nitrate *** matrix factorization(PMF)differentiated the OA into five chemical components including LV-OOA,SV-OOA,COA,HOA and CCOA,accounting for 22%,16%,13%,25%and 24%respectively,of the total *** average NR-PM 1 mass concentration on the heavy polluted days(HPD)was 182.8±70.2μg/m^(3),which was approximately 9 times that on clean days(CD).The enhanced secondary formation of SNA was evident on HPD,especially the rapid increase of sulfate(23%)and nitrate(19%).