扫描电镜技术识别大气中PM_(10)的来源——以福建省龙岩市为例

Application of Electron Microscopic on the Sources of PM_(10) in the Atmosphere

[目的]研究扫描电镜技术在颗粒物的物理特征和形态分布中的应用。[方法]运用扫描电镜技术,分析龙岩市各尘源的形态特征和含有的主要元素,对比采样点样品的形态特征,判断大气可吸入颗粒物的主要来源。[结果]与CMB8.2化学质量平衡受体模型源解析结果相比较,两者具有较好的一致性。以龙岩师专、闽西职业技术学院、龙岩学院、龙岩市环境监测站四个大气常规监测点为例,对PM10贡献较大的分别是土壤风沙尘、燃煤尘、二次扬尘;土壤风沙尘、二次扬尘、机动车尾气尘;二次扬尘、土壤风沙尘;二次扬尘、机动车尾气、燃煤尘。[结论]研究结果对于大气颗粒物源解析、大气环境治理都有一定的指导意义。

[ Objective ] The aim was to study the application of scanning electron microscopy （SEM） on the physical property and ideological distribution of partials. [ Method] By dint of scanning electron microscopy, the morphological property of each source and main elements were analyzed. Compared with morphological property of sampling point, the source of particles was determined. [ Result ] The results were consist-ent with the analysis ot CMBS. 2 chemical mass balance receptor model, lakmg the tour Oetectmn stations in Longyan Normal lrmnmg College, Min Xi Vocational ＆ Technical College, Longyan University, and Longyan Environment Monitoring Station as examples, the major air pollutants respectively were soil, coal dust, second emitted dust, soil second emitted dust, vehicle exhausts emission; second emitted dust, soil; and second emitted dust, vehicle exhausts emission, coal dust. [ Conclusion ] The study result had certain guiding significance to the analysis of sources of particles in the atmosphere and atmosphere environment treatment.