焦作市2021年PM_(2.5)来源解析及组成特征的变化

Source Analysis and Composition Characteristics of PM_(2.5)in Jiaozuo City in 2021

为探究焦作市2021年度PM_(2.5)来源及其组分特征的变化情况,对其样品数据进行了统计,分析了其PM_(2.5)中的无机水溶性离子(WSIs)、碳组分、元素浓度及组成变化。结果表明:二次源及燃烧源是焦作市大气PM_(2.5)主要污染来源。二次污染物来自一次污染,其中WSIs占比最高,而WSIs又以NO_(3)^(-)、NH_(4)^(+)、SO_(4)^(2-)为主。轨迹显示该市大气跨区域污染来源于郑州、亳州及淮北市。2021年PM_(2.5)平均浓度为43.3269μg/m^(3),冬季平均浓度为75.0047μg/m^(3)。

In order to explore the changes of PM_(2.5)sources and component characteristics in Jiaozuo City in2021,the sample data were statistically analyzed.The inorganic water-soluble ions(WSIs),carbon component,element concentration and composition of PM_(2.5)were analyzed.Results show that the secondary source and the source of combustion is a major pollution source of Jiaozuo atmospheric PM_(2.5).Secondary pollutants come from primary pollution,of which WSIs accounted for the highest proportion,while the WSIs is given priority to with NO_(3)^(-),NH_(4)^(+)and SO_(4)^(2-).Trajectory shows that the city’s atmospheric across region pollution comes from Zhengzhou,Luzhou and Huaibei city.The average PM_(2.5)concentration in 2021 was43.3269μg/m^(3),and the average concentration in winter was 75.0047μg/m^(3).