Component and source analysis of the polycyclic aromatic hydrocarbons at the topsoil in Jiaozuo

16 kinds of the priority polycyclic aromatic hydrocarbons (PAHs) were tested with the gas chromatography after pre-treatment to the soil sample from the topsoil (0 ~ 20cm) in Jiaozuo through grid-sampling. 12 kinds of PAHs were detected at soils in the study area, whose total content were in range of 7.766 ~ 69.893μg/kg and average value were 34.993μg/kg. In addition to, Bbf, Baa, Fla, and Chr owning strong carcinogenic effect accounted for about 36.4% of the total content. Through analysis on the composition of the PAHs at soil, we found that there were a certain degrees of the soil pollution and eco-environmental risks in Jiaozuo. Moreover, the content of Phe and Fla was relatively high in the PAHs and they were based on three, four ring. These indicate that the PAHs at soil in Jiaozuo mainly came from the coal-fired. Through correlation analysis, we can speculate Phe is the good indicator for PAHs at the topsoil in Jiaozuo.