土壤扬尘大气颗粒污染物的微观特征分析

[目的]结合形状与能谱成分,分析辨认土壤扬尘大气颗粒物。[方法]采集徐州市和枣庄市土壤颗粒物样品,运用扫描电镜、X射线能谱分析,对颗粒物样品进行了形态特征和表面元素相对含量分析。[结果]结合形态特征和能谱分析,土壤扬尘中主要含有石英、长石和土壤颗粒集合体,还含有少量的其他矿物颗粒。土壤扬尘的特征颗粒是石英、长石和土壤颗粒集合体。[结论]石英颗粒表面光滑致密、棱角分明,特征元素是Si;长石颗粒表面光滑致密、棱角分明,特征元素是Si、Al;土壤颗粒集合体的特征元素也是Si、Al。

Analysis of Microscopic Characteristics of Atmospheric Particulate Pollutants Discharged from Soil

[ Objective] Analysis of soil dust identified by the shape of atmospheric particulate matter in conjunction with the energy spectru,n components was conducted. [ Method] The collection and sampling methods of soil particle samples of Xuzhou City and Zaozhuang City were described, and the shape characteristics of the particulate samples was analyzed using the technique of Scanning Electron Microscope and En- ergy Dispersive X-ray （SEM-EDX） as well as the measurement of the relative content of the surface elements in the same way. [ Result] Com- bining morphological characteristics with energy spectrum analysis, soil dust contained quartz ,＂ feldspar, soil particle aggregates and small a- mounts of other minerals. The characteristic particles of soil dust were quartz, feldspar and soil particle aggregates. [ Conclusion] The quartz particles had smooth and dense surface, very clear edges and comers, whose characteristic element was silicon. The feldspar particles also had smooth and dense surface, very clear edges and corners, whose characteristic elements were Si and A1. The characteristic elements of soil particle aggregates were Si and A1.