Abstract:
Bisphenol A (BPA) is an endocrine disruptor, and currently, there are no environmental thresholds for BPA in surface water quality standards, both domestically and internationally. It is urgent to conduct researches on the water quality standards of BPA in freshwater environments. This study collected and screened chronic toxicity data of BPA on 30 native freshwater organism species belonging to 8 phyla and 23 families, and constructed species sensitivity distribution curves on a system scale using six distribution models, including Boltzmann, DoseResp, Langevin, SGompertz, Slogistic, and SRichards. The long-term water quality criteria value for BPA in freshwater environments was derived as 1.44 μg·L
-1 by using the optimal function. Meanwhile, the long-term ecological risks of BPA in 22 freshwater bodies in China were evaluated using the risk quotient (RQ) and the safety threshold (ST) methods, respectively. The calculated risk results show that the proportion of risk-free and low risk was only 27.27%, while the proportion of high risk and moderate risk was 22.73% and 50.00%, respectively. The research results can provide scientific evidence for the formulation of quality standard and ecological risk assessment of BPA for surface water in China.