Application of the Multi-Electrode in the Degradation of Alizarin Red Induced by Glow Discharge Plasma

This paper presents a novel set-up to be used in the degradation of dye. Various influencing factors, such as the voltage, the number of the anodes, and the catalytic action of Fe2+, were examined. Chemical oxygen demand (COD), ultraviolet (UV), FTIR absorption spectra, and atomic force microscopy (AFM) were used to monitor the degradation process. The results showed that the efficiency of degradation is raised by increasing the applied voltage, and is further improved when two or three anodes are used. Moreover, the use of Fe2+ ion can promote the degradation reaction and shorten the degradation time. So the multi-electrode instrument is more efficient in degrading the dye and should be further studied.