摘要
利用中流量采样器对荣昌区国控空气站点布点采集PM2.5 样品,分析碳组分、水溶性离子组分和金属元素组分,识别出PM2.5 的组分构成.结果表明:荣昌区PM2.5 中的主组分(占比超过 1%)共 14个,按浓度由高到低排列依次为OC、EC、SO42-、NO3-、Si、Al、Ca、V、Na、Fe、K、Cl-、As和NH4+.荣昌区PM2.5 中二次组分(OC、SO42-和NO3-等)占比较高,达45%.利用PMF模型进行分析,在荣昌区PM2.5 中,工业源、交通源、生活源、扬尘和其他源的贡献占比分别为35.7%、29.8%、17.3%、9.3%和 7.8%,工业源为首要贡献源类,交通源略低于工业源.
Abstract
Using a medium flow sampler,PM2.5 samples were collected from the national air control stations in Rongchang District.The carbon components,water-soluble ion components,and metal element components were analyzed to identify the composition of PM2.5 components.The results show that there are a total of 14 main components(accounting for more than 1%)in PM2.5 in Rongchang District,arranged in descending order of concentration as OC,EC,SO42-,NO3-,Si,Al,Ca,V,Na,Fe,K,Cl-,As,and NH4+.The proportion of secondary components(OC,SO42-,NO3-,etc.)in PM2.5 in Rongchang District is relatively high,reaching 45%.Using the PMF model for analysis,in the PM2.5 of Rongchang District,the contributions of industrial sources,transportation sources,domestic sources,dust,and other sources are 35.7%,29.8%,17.3%,9.3%,and 7.8%,respectively.Industrial sources are the primary contributor,while transportation sources are slightly lower than industrial sources.
基金项目
重庆市挥发性有机物治理与应用评估工程技术研究中心开放课题(2022)(CQHJ-KFKY-2021-01)
NETL
NSTL
万方数据