Perovskite LaFexCo1-xO3-λ deposited SiO2 catalytic membrane for deeply cleaning wastewater

To improve the cleaning efficiency of the membranes for wastewater, perovskite LaFe x Co 1-x O 3-λ deposited SiO 2 catalytic membrane (PCM) with functionality of peroxymonosulfate (PMS) induced catalytic oxidation and membrane separation was prepared by employing LaFe x Co 1-x O 3-λ deposited SiO 2 as the functional layer on diatomite support. The perovskite LaFe x Co 1-x O 3-λ deposited SiO 2 functional layer was modified by doping Fe, which contributed to the generation of oxygen vacancies, resulting in the massive generation of singlet oxygen and sulfate radicals during the pollutant degradation processes. Besides, the heterogeneous catalyst was effectively immobilized by PCM, and the mass transfer was enhanced owing to the adequate curved channels and eddy diffusion, performing a preferable catalytic oxidation efficiency and permeability. The water yield and degrading efficiency for tetracycline hydrochloride aqueous solution (20 mg/L) were 1064.5 L/m 2 h and 99%, respectively. Simulated wastewater containing organic pollutant and oil was treated by PCM, demonstrating an attractive separation and catalytic performance. Furthermore, cycling and regeneration test indicated that the PCM exhibited favorable stability and regeneration abilities after 10 consecutive cycles. Therefore, PCM with capacities of separation and catalytic oxidation performed potential application in complex wastewater treatment.