The removal effect and mechanism of potassium ferrate(Fe(Ⅵ))on bisphenol A(BPA),a typical endocrine disruptor chemical substance,are studied.The effects of pH value,Fe(Ⅵ)dosage,and coexisting ions on the removal efficiency of BPA are investigated through using high-performance liquid chromatography(HPLC),ion chromatography,and other measurements.The results show that the degradation rate of BPA reaches 81.5％after 10 minutes of reaction at a pH of 8.0 and a Fe(Ⅵ)to BPA concentration ratio of 30∶1.The co-existed anions including Cl-,SO42-,NO3-and HCO3-exert negligible effect on the oxidation ability of Fe(Ⅵ)system,while Ca2+and Mg2+both accelerate the self-decomposition of Fe(Ⅵ)and therefore suppress the degradation of BPA.The reactive oxygen species in the system are identified through quenching experiments,and Fe(Ⅵ)and its intermediate high valence product Fe(Ⅴ)/Fe(Ⅳ)play a dominant role in the oxidation of BPA.In some real water bodies(tap water,municipal secondary effluent,and groundwater),no obvious negative effects on degradation of BPA by Fe(Ⅵ)oxidation system have been observed,indicating a high adaptability.
维普
万方数据
