2020年疫情期间镇江市典型区域环境空气质量分析  

Analysis of Environmental Air Quality in Typical Area of Zhenjiang during the COVID-19 Pandemic in 2020

作　　者：田苗苗 张先宝 茅晶晶[2] 霍玉玲 郭劲秋 TIAN Miao-miao;ZHANG Xian-bao;MAO Jing-jing;HUO Yu-ling;GUO Jin-qiu(Zhenjiang Eiwironmental MonUoring Cervter,Zhenjiang,Jiangsu 212009,China;Jiangsu Environmental Monitoring Center,Nanjing 210019,China)

机构地区：[1]江苏省镇江环境监测中心,江苏镇江212009 [2]江苏省环境监测中心,南京210036

出　　处：《四川环境》2021年第6期130-138,共9页Sichuan Environment

基　　金：江苏省环保科研课题项目资助(2019023)。

摘　　要：为了探究影响镇江市环境空气质量的关键原因,以PM_(2.5)组分和臭氧前体物VOCs作为分析对象,探讨了镇江市区在2020年春节及新冠疫情严管期间的污染物排放及来源情况。结果表明:2020年春节期间,镇江市区PM_(2.5)、PM10、SO_(2)、NO_(2)、O_(3)、CO平均浓度处于自2016年以来同期最好水平;其中PM_(2.5)受本地扬尘及输入性沙尘影响较小,二次气溶胶贡献较大,市区人口密集区空气硝酸离子占主导要素,交通源对PM_(2.5)组成贡献较大;而工业区的烯烃和芳香烃是臭氧生成潜势主要贡献者,而人为排放的VOCs主要来源是燃烧源。结合采样期间疫情管控实际情况,推测排放源主要以火力电厂燃煤排放为主。因此镇江市未来应从工业燃烧减排及交通优化等方面着手,进一步改善环境空气质量。In order to explore the key factors affecting the environmental air quality of Zhenjiang city.PM_(2.5) components and ozone precursors VOCs were taken as the analysis objects to explore the emission and source of pollutants in Zhenjiang urban area during the Spring Festival and COVID-19 control period in 2020.The results showed that during the Spring Festival in 2020,the average concentration levels of PM_(2.5),PM10,SO_(2),NO_(2),O3 were the best compared with the same period since 2016.PM_(2.5) was less influenced by regional and imported dust,and the contribution of secondary aerosol particles was greater.Nitrate ions in the air of densely populated urban areas was the dominant factor,.and traffic sources contributed greatly to the composition of PM_(2.5).In the monitoring sites close to industrial areas,olefin and aromatic hydrocarbons were the main contributors to O3 generation potential,while the man-made VOCs emission was mainly derived from combustion.Combined with the actual situation of pandemic control during the sampling period,it is speculated that the main emission source was mainly from coal burning in power plants.Therefore,Zhenjiang City should further improve the ambient air quality from the aspects of industrial combustion emission reduction and traffic optimization in the future.

关 键 词：新冠疫情 空气质量 PM_(2.5)组分 VOCS 

分 类 号：X51[环境科学与工程—环境工程]