Distribution and Source Identification of Polycyclic Aromatic Hydrocarbons Residues in Different Types of Topsoil Collected from Jilin Province, China

摘要

Samples of top soils (0-20 cm) were collected in Jilin province in the northeast of China. The levels of 16 polycyclic aromatic hydrocarbons were analyzed by gas chromatography. In soils, the total content of 16 polycyclic aromatic hydrocarbons ranged between 67.1 ng g~(-1) to 27941.2 ng g~(-1) (dry weight) with arithmetic mean of 2190 ng g~(-1) for samples collected different types of soil. The polycyclic aromatic hydrocarbons composition of surface soil in Jilin Province, mainly in the 3 and 4 rings such as pyrene. The research shows that there was a strong pyrogenic influence on soil polycyclic aromatic hydrocarbons in all soils sampled in Jilin province. Some parts of the test results show mat different molecular indices forphenanthrene/anthracene andfiuoranthene/pyrene, respectively, indicates a possible influence of petrogenic inputs. Soil organic carbon is an important factor to affect distribution of polycyclic aromatic hydrocarbons in the soil samples. These results indicate that local sources of polycyclic aromatic hydrocarbons, especially different types of land, lead to very different values of polycyclic aromatic hydrocarbons.