黄石市大气颗粒物的特征分析

摘要

为监测和分析大气污染物,采集了湖北黄石市大气颗粒物样品,利用扫描电镜、电子能谱仪和X-射线光电子能谱仪对其进行了形态观察和化学成分分析.结果显示:颗粒物多为不规则形貌不同的颗粒,是各种尘源的混合体.各颗粒微区中C、O、Si、Ca、Fe元素较多,其次是Si、S、Al、Na等.Si的主要存在形式为硅酸盐、SiO2;Na的主要存在形式为Na2 SO4、Na3 PO4;Ca的主要存在形式为CaF2;S的主要存在形式为Fe2(SO4)3.%In order to monitor and analyze the air pollutants , the samples of atmospheric particles were collected in Huangshi City, Hubei Province.Their morphology and chemical composition were analyzed by SEM , EDS and XPS.The results indicated that the particles were mostly in irregular shape , being a mixture of various dust sources .Atmospheric particles were mainly composed of C, O, Si, Ca and Fe with small amount of Si , S, Al and Na in each microdomain.Element Si existed in the form of silicate or SiO2, Na in Na2SO4 or Na3PO4, Ca in CaF2, and S in Fe2(SO4)3.