Ultra-high efficient catalytic degradation of BPA by ozone-function microbubble aerated ceramic membrane for water purification

High efficiency sewage purification is of great significant to environmental protection and water resources utilization. The integration of ozone into conventional water treatment processes is considered as a potential way to enhance water purification efficiency. However, this method is still hindered by low utilization efficiency, poor dispersion, and slow mass transfer rates. In this study, a catalytic ozone functional microporous aeration ceramic membrane (COMA) with nozzle structure was prepared by a hydrothermal method. The results showed that the as-prepared COMA displayed ultra-high efficient catalytic degradation of BPA. The degradation efficiency reached 90 % after 60 min, which is much higher than that of pure ceramic membrane (CM) (75 %), titanium alloy (70 %), and previous reported results. The catalytic degradation mechanism was investigated based on the analysis of COMA surface condition. The high degradation efficiency may be ascribed to unique pore structure of ceramic membranes, increased efficiency of ozone use and microbubble. This paper provide a high efficiency water purification membrane and ozone aeration method, which have wide potential application in the field of sewage treatment.