Spatial Distribution and Risk Assessment of Polycyclic Aromatic Hydrocarbons in Partial Surface Sediments of Taihu Lake
The amounts of polycyclic aromatic hydrocarbons (PAHs) from 20 typical surface sediment sites in Taihu Lake were tested by GC-MS. Concentrations of the 13 detected PAHs compounds ranged from 422. 3 to 2001. 1 (ig/kg, among which five PAHs were identified by China as priority pollutants, while 11 PAHs were identified by the US EPA as priority pollutants, and the range of PAHs wass 277. 5-1 7S6. 8 u,g/kg, the highest concentration was found in Meiliang Bay area. PAHs in the lake district showed a general spatial distribution trend as follows:Meiliang Lake > Southern district > Eastern district > Central district. Risk evaluation suggested that the 11 PAHs identified as priority pollutants by the US EPA have not shown obvious harm to the water environment, with the exception of Flu, which showed a moderate potential risk level at some sites. The characteristic compound index method indicated that fuel combustion was the main source of PAHs in Taihu Lake.
NETL
NSTL
万方数据
维普
