摘要
探寻长沙某区域内的大气污染成因,为该区域大气污染预警与控制提供理论依据。以该区域内大气中PM_(2.5)、PM_(10)、O_(3)、NO_(2)、SO_(2)、CO、有机污染物等污染因子为研究对象,以各污染因子浓度与组成在2021年3月至2022年2月的监测数据为依据,通过污染因子与影响因素之间的关联性分析,确定该区域内各污染因子的形成原因。结果显示:该区域内PM_(2.5)年均浓度为40μg/m_(3)、PM_(10)年均浓度为43μg/m^(3),大气颗粒污染物主要由工地扬尘、非道路移动机械、机动车尾气以及燃烧源共同引起;大气有机物污染主要是由机动车尾气排放、有机溶剂挥发以及化石燃料燃烧产生。通过对臭氧生成潜势进行分析发现,芳香烃类物质贡献最大,占比60.8%,其次为烯烃类物质,占比为22.9%,这表明该区域臭氧浓度受溶剂涂料使用工序影响较大。
In order to explore the causes of air pollution in a certain area of Changsha,and to provide a theoretical basis for the early warning and control of air pollution in this area,this paper takes the pollution factors such as PM_(2.5),PM_(10),O_(3),NO_(2),SO_(2),CO and organic pollutants in the atmosphere of this area as the research object,and determines the causes of each pollution factor in this area through the correlation analysis between the pollution factors and the influencing factors based on the data from March 2021 to February 2022 of the concentration and composition of each pollution factor.The results show that the annual average concentration of particulate pollutant PM_(2.5) in this area is 40μg/m^(3),and PM_(10) is 43μg/m^(3).And the particulate pollutants are mainly caused by fugitive dust from the construction site,non-road mobile machinery,motor vehicle exhaust and combustion sources.The study also finds that vehicle exhaust emissions,organic solvent volatilization and fossil fuel combustion are the main reasons for the increase of organic pollutant concentration.Through the analysis of ozone production potential,it is found that aromatic hydrocarbons contribute the most,accounting for 60.8%,followed by olefins,accounting for 22.9%,which indicates that the ozone concentration in this area is greatly affected by the solvent coating process.
作者
黄刚
HUANG Gang(Changsha Yuhua Ecological Environment Monitoring Office,Changsha Hunan 410019,China)
出处
《长沙大学学报》
2023年第2期60-65,87,共7页
Journal of Changsha University
