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The in situ electrochemical oxidation process has received considerable attention for the removal of dye molecules and ammonium from textile dyeing and finishing wastewater. Nevertheless, the cost and durability of the catalytic anode have seriously limited industrial applications of this technique. In this work, the lab-based waste polyvinylidene fluoride membrane was employed to fabricate a novel lead dioxide/polyvinylidene fluoride/carbon cloth composite (PbO 2 /PVDF/CC) via integrated surface coating and electrodeposition processes. The influences of operating parameters (pH, Cl - concentration, current density, and initial concentration of pollutant) on the oxidation efficiency of PbO 2 /PVDF/CC were evaluated. Under optimal conditions, this composite achieves a 100% decolorization of methyl orange (MO), 99.48% removal of ammonium, and 94.46% conversion for ammonium-based nitrogen to N 2 , as well as an 82.55% removal of chemical oxygen demand (COD). At the coexistent condition of ammonium and MO, MO decolorization, ammonium, and COD removals still remain around 100%, 99.43%, and 77.33%, respectively. It can be assigned to the synergistic oxidation effect of hydroxyl radical and chloride species for MO and the chlorine oxidation action for ammonium. Based on the determination of various intermediates, MO is finally mineralized to CO 2 and H 2 O, and ammonium is mainly converted to N 2 . The PbO 2 /PVDF/CC composite exhibits excellent stability and safety.

Fabrication of PbO2/PVDF/CC Composite and Employment for the Removal of Methyl Orange