Chemical characteristics and sources of water-soluble organic aerosol in southwest suburb of Beijing

作     者：Ruolan Hu Qingcheng Xu Shuxiao Wang Yang Hua Noshan Bhattarai Jingkun Jiang Yu Song Kaspar R.Daellenbach Lu Qi Andre S.H.Prevot Jiming Hao Ruolan Hu;Qingcheng Xu;Shuxiao Wang;Yang Hua;Noshan Bhattarai;Jingkun Jiang;Yu Song;Kaspar R.Daellenbach;Lu Qi;Andre S.H.Prevot;Jiming Hao

作者机构：State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution ComplexBeijing 100084China State Key Joint Laboratory of Environment Simulation and Pollution ControlDepartment of Environmental SciencePeking UniversityBeijing 100871China Laboratory of Atmospheric ChemistryPaul Scherrer Institute5232 VilligenSwitzerland Institute for Atmospheric and Earth System ResearchUniversity of HelsinkiFinland 

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：99-110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 National Natural Science Foundation of China(No.21625701) the Beijing Municipal Science and Technology Project(No.Z181100005418018 and Z191100009119001) funding of the SNF project"Source Apportionment of Organics in ambient air including Primary,Secondary Organic Aerosols and trace Gases(SAOPSOAG)"(No.200021_169787) 

主　　题：pollution aerosol winter 

摘      要：PM2.5 filter sampling and components measurement were conducted in autumn and winter from 2014 to 2015 at a suburban site(referred herein as LLH site) located in the southwest of *** offline aerosol mass spectrometry(offline-AMS) analysis and positive matrix factorization(PMF) were applied for measurement and source apportionment of watersoluble organic aerosol(WSOA).Organic aerosol(OA) always dominated PM2.5 during the sampling period,especially in *** pollution was serious during the polluted period both in autumn(31.1 μg/m3) and winter(31.9 μg/m3),while WSOA accounted for 54.4%of OA during the polluted period in autumn,much more than that(21.3%) in *** oxidation degree of WSOA at LLH site was at a high level(oxygen-to-carbon ratio,O/C=0.91)and secondary organic aerosol(SOA) contributed more mass ratio of WSOA than primary organic aerosol(POA) during the whole observation *** winter,coal combustion OA(CCOA) was a stable source of OA and on average accounted for 25.1% of *** autumn,biomass burning OA(BBOA) from household combustion contributed 38.3% of WSOA during polluted *** addition to oxygenated OA(OOA),aqueous-oxygenated OA(aq-OOA) was identified as an important factor of *** heavy pollution period,the mass proportion of aq-OOA to WSOA increased significantly,implying the significant SOA formation through aqueous-phase *** result of this study highlights the concentration on controlling the residential coal and biomass burning,as well as the research needs on aqueous chemistry in OA formation.