Electrochemical Degradation of Typical Dyeing Wastewater in Aqueous Solution: Performance and Mechanism

Abstract

In this study, the degradation of cationic turquoise blue GB (GB) by electrochemical oxidation with typical rare earth doped PbO2 electrodes was studied. The novel PbO2 doped with typical rare earth (Ce) electrode was prepared by thermal decomposition-electrodeposition technique. The effects of electrodes applied as anodes in electrochemical oxidation system were carefully studied for GB degradation and the effects of Ce-doped and undoped electrodes were compared. Optimal degradation conditions were explored with Ce-doped by the study the effects of different parameters, such as current densities and electrolyte concentrations. The characteristics of undoped and Ce-doped electrode were analyzed based on the SEM images. The mechanism of GB degradation in electrochemical oxidation with Ce-doped electrode was discussed based on the intermediates analyzed by IC and GC/MS.