PHENOL REMOVAL WITH ELECTROCHEMICAL CARBON NANOTUBES FILTER COUPLED WITH IN SITU GENERATED H202

Abstract

IN THIS STUDY, A NEW WASTEWATER TREATMENT SYSTEM COMBINING ADSORPTION AND OXIDATION IN THE CNT ANODE AND OXIDATION WITH IN SITU GENERATED HYDROGEN PEROXIDE IN THE CNT CATHODE WAS DEVELOPED. THE TREATMENT EFFICIENCY, IMPACTING FACTORS, AND MECHANISM OF THE SYSTEM WERE SYSTEMATICALLY STUDIED. THE RESULTS DEMONSTRATE THAT ELECTRODE MATERIAL, CATHODE POTENTIAL, PH, FLOW RATE, AND DISSOLVED OXYGEN COULD AFFECT H2O2 YIELD. THE MAXIMUM H2O2 YIELD OF 1.38 MOL HR-1 M-2 WAS ACHIEVED WITH C-GRADE CNT AT AN APPLIED CATHODE POTENTIAL OF -0.4 V (VS. AG/AGCL), AND OTHER OPTIMIZED CONDITIONS. A HIGH PHENOL REMOVAL EFFICIENCY OF 87.0?1.8% WITHIN 4 H OF CONTINUOUS OPERATION WAS ACHIEVED WITH AN AVERAGE OXIDATION RATE OF 0.059?0.001 MOL HR-1 M-2 AT AN APPLIED CATHODE POTENTIAL OF -0.4 V (VS. AG/AGCL). THE NEWLY DEVELOPED ELECTROCHEMICAL CNT FILTRATION SYSTEM COUPLED WITH IN SITU GENERATED H2O2 MAY BE USED AS A COST-EFFECTIVE WASTEWATER TREATMENT SYSTEM TO REMOVE ORGANIC POLLUTANTS.