Bisphenol A pollution in aquatic waters of Pearl River Delta and related ecological risk assessment

Bisphenol A (BPA) in surface water and sediments of aquiculture pond in Zhongshan City was determined. BPA is detected in all surface water samples and 44.4% sediment samples. Residual content of BPA in surface water is in the range of 0.96 ~ 4.51 μg·L^-1, with an average of 3.29 μg·L^-1, that in sediments is in the range of 0.19~1.31 ng·g^-1(dry weight), with an average of 0.23 ng·g^-1(dry weight). No significant relationship exists between BPA content and that of main environmental factors, except for pH and COD. Based on EC/PNEC evaluation standard, BPA residuary extent of the aquatic environment in Zhongshan City could induce minimal ecological risk to people and the environment.