WANG Ping^1,2，ZHAO Youzhi¹,DING Wenci¹,LI Zengzeng¹,LIU Suixin²

(1.School of Marine Science and Technology，Hainan Tropical Ocean University，Sanya 570022,China； 2.Key Laboratory of Aerosol Chemistry and Physics；Institute of Earth Environment,Chinese Academy of Sciences，Xi’an 710061,China)

Abstract:In this paper,by analyzing the PM2.5 mass concentration and species of atmospheric particulate matter in Jinniu district of Chengdu city from December 2017 to January 2018,we obtained the characteristics of species composition changes such as OC-EC,water-soluble ions and trace elements.PM2.5 source analysis was performed by the PMF model.The results show that the carbonaceous components of the two sampling points are mainly from secondary organic carbon (the value of OC/EC is about 5.0).The main component of water-soluble ions is indicating that the ambient air is greatly affected by motor vehicle pollution in Jinniu district.Trace elements of S,Cl,Cr,Cu,Zn,Ni and Pb have higher EF values and obviously affected by human activities.The SNA component in PM2.5 is close to 50%,indicating that the secondary aerosol is an important component in PM2.5.Offline PMF source analysis shows that the primary source of pollution is secondary aerosol (38.4%),followed by traffic sources (21.2%),coal burning (15.1%),biomass burning (13.6%) and soil dust (11.7%).

Keywords:fine particulate matter;positive definite matrix factorization model；filter sampling;source apportionment

中图分类号：X513                               文献标志码：A

文章编号：1008-5548(2020)05-0014-08

DOI:10.13732/j.issn.1008-5548.2020.05.003

收稿日期： 2020-02-27，修回日期：2020-05-21，在线出版时间：2020-07-07 15:01。

基金项目：国家自然科学基金项目，编号：41867046;中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金项目，编号：SKLLQG1830;中国科学院气溶胶化学与物理重点实验室开放基金项目，编号：KLACP2001;2019年海南省基础与应用基础研究计划(自然科学领域)高层次人才基金项目，编号：2019RC243;2018年三亚市院地科技合作项目，编号：2018YD14。

第一作者简介：王平(1971—)，男，博士，副教授，研究方向为海洋气溶胶。E-mail:wangpingalong@163.com。

通信作者简介：赵由之(1979—)，男，讲师，研究方向为PM2.5污染与治理。E-mail:youz_zhao@126.com。