Pollution Characteristics and Health Risk of Heavy Metals and Polycyclic Aromatic Hydrocarbons in a Co-contaminated Site

Abstract:

The environmental investigation, pollution characteristics analysis and health risk assessment were performed for a heavy metals and polycyclic aromatic hydrocarbons(PAHS) co-contaminated site. The results showed that there are high concentrations of Sb and PAHs in surface (0.3 m) and subsurface (1.1 m) soils. Due to the concentration of Sb in soil, there is also high concentration of Sb in Shallow groundwater. The distribution of contaminants has obvious spatial difference and through migrating in environmental or entering successively, contaminants from different sources coexist in parts of the co-contaminate site. The health risk assessment indicates that the risk control values of Sb, BaA, BbFA, BaP, IPY, DBA and BkF for soil are as follows: 6.67, 0.73, 0.73, 0.4, 0.73, 0.1 and 7.22 mg?kg-1, and that of Sb for groundwater is 0.185 mg?L-1. The repaired soil and groundwater volume are 1.54×104 m3 and 136.3 m3, respectively.