Electrochemical Degradation Of Chloramphenicol Using Ti-Based Sno2-Sb-Ni Electrode

Antibiotic residues may be very harmful in aquatic environments, because of limited treatment efficiency of traditional treatment methods. An electrochemical system with Ti-based SnO-Sb-Ni anode was developed to degrade a typical antibiotic chloramphenicol (CAP) in water. The electrode was prepared by sol-gel method. The performance of electrode materials, impact factors and dynamic characteristics were evaluated. The Ti-based SnO2-Sb-Ni electrode was compact and uniform by the characterization of SEM and XRD. The electrocatalytic oxidation of CAP was carried out in a single-chamber reactor by using Ti-based SnO-Sb-Ni electrode. For 100 mg L CAP, the CAP removal ratio of 100% and the TOC removal ratio of 60% were obtained at the current density of 20 mA cm and in neutral electrolyte at 300 min. The kinetic investigation has shown that the electro-oxidation of CAP on Ti-based SnO-Sb-Ni electrode displayed pseudo first-order kinetic model. Free radical quenching experiments presented that the oxidation of CAP on Ti-based SnO-Sb-Ni electrode resulted from the synergistic effect of direct oxidation and indirect oxidation . Doping Ni on the Ti/SnO-Sb electrode for CAP degradation was presented in this paper, showing its great application potential in the area of antibiotic and halogenated organic pollutants degradation.