Application of electrochemical oxidation to remove textile dyes from water

Abstract

Electrochemical oxidation using electrodes can be applied to remove dyes used in the textile industry from wastewater. In this study, three different electrode types were used to remove dyes (Congo Red, Naphthol Green B, Rhodamine B and Methylene Blue) from water. The electrochemical oxidation study was performed using boron doped diamond (BDD), mixed metal oxides (MMO) and graphite electrodes. Experiments were performed with artificially contaminated water. Dye solutions after the electrochemical oxidation process were analyzed using a PerkinElmer UV/VIS spectrophotometer and a TOC-V CSH Shimadzu total organic carbon analyzer. After 60 min of electrochemical oxidation process, the colors of all dyes were removed using BDD, MMO and graphite electrodes. The removal efficiency achieved was not less than 94.00% for congo red, not less than 31% for naphthol green B, not less than 96% for rhodamine B, and not less than 94% for methylene blue.