2018年冬季安徽省典型城市PM_(2.5)来源解析的数值模拟研究  

Numerical simulation study of the source apportionment of PM_(2.5) in typical cities of Anhui Province in the winter of 2018

作　　者：曹广翰 曹天慧 田旭东 施耀[1] 何奕[1] CAO Guanghan;CAO Tianhui;TIAN Xudong;SHI Yao;HE Yi(School of Chemical Engineering and Biological Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;Eco-Environmental Science Research&Design Institute of Zhejiang Province,Hangzhou 310007,Zhejiang,China;Zhejiang Provincial Ecological Environmental Monitoring Center,Hangzhou 310012,Zhejiang,China)

机构地区：[1]浙江大学化学工程与生物工程学院,浙江杭州310027 [2]浙江省生态环境科学设计研究院,浙江杭州310007 [3]浙江省生态环境监测中心,浙江杭州310012

出　　处：《地球化学》2023年第2期147-157,共11页Geochimica

基　　金：长三角PM_(2.5)和臭氧协同防控策略与技术集成示范大气专项(2018YFC0213806)资助。

摘　　要：细颗粒物(PM_(2.5))是决定环境空气质量的关键污染物。随着近年来环保措施的实施, PM_(2.5)的来源特征也随之发生变化,探究PM_(2.5)的主要来源及其贡献值对制定有效的PM_(2.5)治理方案具有重要的现实意义。本研究使用CMAQ-ISAM模型,考察2018年冬季不同来源区域和来源种类对合肥市区PM_(2.5)及其关键组分的贡献。结果表明,合肥市区冬季PM_(2.5)的主要区域来源为长三角外的远距离传输(52.6%),其次为合肥市的本地排放(26.3%)和安徽省其他城市的传输(12.3%)。远距离传输对硫酸盐、硝酸盐和有机C的贡献最大(57.9%、68.2%和69.5%),而铵盐和元素C主要来自本地排放(37.1%和52.9%)。合肥市本地及周边区域的6类排放源中,工业源对PM_(2.5)的贡献最大(21.3%),其次为农业源(11.6%),其中工业源的贡献主要来自本地排放,而周边区域农业源的贡献大于本地农业源。硫酸盐、硝酸盐和元素C的主要来源种类为工业源(33.9%、13.8%和38.6%),铵盐和有机C则分别为农业源(64.2%)和民用源(17.7%),其中工业源和民用源的贡献主要来自本地排放,农业源则为周边区域传输。Fine particulate matter(PM_(2.5))is the key pollutant that determines the ambient air quality.The source characteristics of PM_(2.5) have changed with the implementation of environmental protection measures in recent years.Exploring the main sources of PM_(2.5) and its contribution has important practical significance for developing effective PM_(2.5) control strategies.In this study,the CMAQ-ISAM model was used to investigate the contribution of different source regions and categories to PM_(2.5) and its key components in the Hefei urban area in the winter of 2018.The research results show that the main regional source of PM_(2.5) in Hefei in winter is long-distance transport outside the Yangtze River Delta(52.6%),followed by local emissions of Hefei(26.3%)and the transport from other cities in Anhui Province(12.3%).Long-distance transport makes the greatest contribution to sulfate,nitrate,and organic carbon(57.9%,68.2%,and 69.5%,respectively),while ammonium salts and elemental carbon mainly originate from local emissions(37.1%and 52.9%).Among the 6 types of source categories in the local and surrounding areas of Hefei,industrial sources have the largest contribution to PM_(2.5)(21.3%)followed by agricultural sources(11.6%).The contribution of industrial sources is mainly from local emissions,while the contribution of agricultural sources from surrounding areas is larger than that of local agricultural sources.The main sources of sulfate,nitrate,and elemental carbon are industrial sources(33.9%,13.8%,and 38.6%,respectively),while those of ammonium salts and organic carbon are agricultural sources(64.2%)and residential sources(17.7%),respectively.Among them,the contribution of industrial and residential sources is mainly from local emissions,while that of agricultural sources is transport from surrounding areas.

关 键 词：PM_(2.5) CMAQ-ISAM模型 来源解析 安徽省 

分 类 号：P593[天文地球—地球化学] X513[天文地球—地质学]