Abstract:Bisphenol A is a typical biotoxic pollutant, which has seriously threatened the health and safety of human beings and organisms. Tungsten-doped silver phosphate (W-AP) photocatalyst could effectively remove bisphenol A from water under visible light. Based on it, this paper systematically studied the degradation behavior of bisphenol A by W-AP, including the influence of operating conditions, the calculation of attack sites, the deduction of degradation pathways and the assessment of ecotoxicity. By response surface optimization experiment, the second order regression equation was obtained and the optimal operating conditions were as follows: the catalyst dosage was 350 mg/L, the pollutant concentration was 10 mg/L, the pollutant pH was 5.60, and the irradiation intensity was 100 mW/cm2. Under this condition, the degradation rate of bisphenol A reached 90.61%. The radical attack sites of bisphenol A molecules were calculated by density functional theory, and three specific degradation pathways were deduced by experiments. The degradation sites were mainly located in the benzene ring and the C sp3-C sp2 bridge bond connecting the two benzene rings. The ecotoxicity assessment showed that the ecotoxicity of the intermediates from the degradation of bisphenol A by W-AP was significantly reduced. This paper provided strategy for efficient removal of bisphenol A from water, which could realize beneficial remediation of water environment.