UV Stimulated Manganese Dioxide for the Persulfate Catalytic Degradation of Bisphenol A

One of the most commonly produced industrial chemicals worldwide, bisphenol A (BPA), is used as a precursor in plastics, resins, paints, and many other materials. It has been proved that BPA can cause long-term adverse effects on ecosystems human health due to its toxicity an endocrine disruptor. In this study, we developed integrated MnO2/UV/persulfate (PS) process for use photocatalytic degradation from water examined reaction mechanisms, pathways, reduction. Comparative tests using MnO2, PS, UV, UV/MnO2, MnO2/PS, UV/PS processes were conducted under same conditions investigate mechanism catalytic by proposed MnO2/UV/PS process. The best performance was observed which completely removed 30 min with reduction rate over 90% total organic carbon after 2 h. This also showed stable removal efficiency large variation pH levels (3.6 10.0). Kinetic analysis suggested 1O2 SO4•? played more critical roles than •OH degradation. Infrared spectra UV irradiation could stimulate generation –OH groups MnO2 photocatalyst surface, facilitating PS pathways further five steps, thirteen intermediates identified gas chromatography-mass spectrometry. acute analyzed during treatment, showing slight increase (by 3.3%) first then decrease four-fold These findings help elucidate provide effective strategy.