炼焦粉尘中多环芳烃的赋存特性

通过对焦化厂不同地点的粉尘采样,并进行粒度分级、超声波预处理及高效液相色谱分析,得到多环芳烃(PAHs)的赋存特性。在采集的样品中,地面除尘站粉尘仓的粉尘中PAHs的含量最高,达到1880.83μg/g。在焦化粉尘中,PAHs明显表现出对小粒径粉尘的富集特性,粉尘中单组分的PAHs含量差别较大,以4～6环的PAHs居多。此外,地面除尘站粉尘仓的粉尘样品中含有大量的苯并[a]芘。 The occunence speciality of polycyclic aromatic hydrocarbons(PAHs) in coking dust was obtained by classifying, ultrasonic pretreating and HPLC analysing dust samples collected from different sites of coking plant. Among the samples the PAHs content of the dust sample from dust bin of ground dedust station is the highest that is up to 1880. 83μg/g. In the coking dust the occurrence speciality of polycyclic aromatic hydrocarbons is obvious for small particle dust, and the PAHs contents of single constituent is quite different most of which contain 4-6 rings. Furthermore, large amount of benzo(a) pyrene is contained in the dust sample from dust bin of ground dedust station