Activation of peroxymonosulfate in an electrochemical filter by MnFe2O4-rGO electro-assisted catalytic membrane for the degradation of oxytetracycline

In this work, an effective electro-assisted catalytic activation system using a cathode catalytic membrane was proposed for use in an electrochemical filter. The electrocatalytic membrane strengthened the production of 1O2, which plays an important role in removing organic pollutants. Under the conditions of a PMS dosage of 300 mg/L, voltage of 3 V, and flow rate of 8 mL/min, the oxytetracycline (OTC) degradation efficiency can reach 88.3%. In addition, the degradation efficiency loss of MnFe2O4-reduced graphene oxide nanocomposite electrochemical membranes was only 13.9% after repeated use five times at a high flow rate, and the metal leaching rate remained in a very low range. The OTC degradation mechanism in the electrochemical filter was analyzed, and a clear explanation was provided for the removal pathway. The results indicate that the electro-assisted catalytic activation system has substantial potential for practical applications.