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飘尘是大气中粒径在1×10~(-2)～10微米的悬浮粒子。其来源有自然源和人工源两种。自然源产生的飘尘中的金属元素含量接近地表成分;人工源产生的飘尘中金属元素含量远高于地表中的含量,种类变化大,地区差值大。通过对飘尘中痕量元素的分析既可以研究自然界这些物质的迁移规律,也可以研究污染物的迁移并估计空气污染程度,确定污染源。
Fly ash is the airborne particle size of 1 × 10 ~ (-2) ~ 10 microns of suspended particles. The source of natural and artificial source of two kinds. The content of metal elements in fly ash generated by natural sources is close to the surface composition; the content of metal elements in fly ash generated by artificial sources is much higher than the content in the ground surface, and the types vary greatly and the differences between regions are large. The analysis of trace elements in fly ash can not only study the migration of these substances in nature, but also study the migration of pollutants and estimate the degree of air pollution and determine the sources of pollution.