Search

The halogenated polycyclic aromatic hydrocarbons (H-PAHs) have been paid increasing attentions due to their potential health hazards. This research firstly investigated distribution and cancer risk of 7 parent polycyclic aromatic hydrocarbons (PAHs) and 19 H-PAHs in Songhua river and Songhua lake of Jilin city, China. The results indicate that 7 parent PAHs and 12 H-PAHs were coexisted. The total concentrations of PAHs, Cl-PAHs, and Br-PAHs respectively ranged from 75.6 to 323.33 with a median concentration of 164.48 ng/L, n.d. to 45.87 with a median concentration of 2.19 ng/L, and n.d. to 56.93 ng/L with a median concentration of 4.67 ng/L. The seasonal variation was obvious; the highest total concentrations of PAHs and H-PAHs were occurred in melt season, which suggests that melting snow and riverine input were major sources of PAHs and H-PAHs. For cancer risk, the incremental lifetime cancer risk (ILCR) values of PAHs and HPAHs for all the sampling sites and water seasons were lower than 1.00E-06, suggesting that the cancer risk of these compounds were low, while the cancer risk may be underestimated due to a lack of toxicity data for some H-PAHs. [ABSTRACT FROM AUTHOR]