Abstract:

The distribution of polycyclic aromatic hydrocarbons (PAHs) was studied by determining the levels of 16 PAHs in water samples of the Jiulong River, a very important drinking water source for Fujian and Longyan, China. Samples of surface water were collected from the Jiulong River in November 2011, January 2012, and March 2012, and polycyclic aromatic hydrocarbons (PAHs) were analyzed with constantenergy synchronous fluorimetric method in the present study. The results showed that the total concentrations of PAHs in water ranged from 9.9 to 178.8 ng/L. The PAHs were dominated by 3-ring (56.7%), 5-ring (24.6%) and 4-ring (15.1%) components in water samples.The 3-ring, 4-ring and 5-ring PAHs were the most common components in the provincial control section of the Jiulong River. The toxic quivalency factors (TEFs) were used to calculate benzo\[a\]pyrene equivalents (EBaP) for water samples. The values in four sampling point of benzene\[a\] pyrene (BaP) toxicity equivalent value (EBaP) were beyond the Chinese Environmental Protection Agency (CEPA) guidelines for drinking water (2.8 ng/L). Overall, the surface water resources showed some carcinogenic potential. The result of ecological risk assessment indicated that high potential ecological risk of PAHs was not found in water of the provincial control section of the Jiulong River, Longyan