The degradation of the AB1 dye by electro-generated species using a BDD electrode was performed. The results were explained by the generation of OH * radical, S2O8 2− in the presence of sulfate, and active halide species in the presence of halide salt. The discoloration rate increases in this order: sulfate, KCl, KBr. In the presence of KCl, the discoloration is affected by the current density, initial pH, temperature, and concentration of the supporting electrolyte; however, the concentration of the dye and the ionic strength showed a negligible effect. The intermediates produced during the discoloration are a function of the pH of the solution. In the presence of sulfate, the discoloration rate is very slow, and the mechanism of discoloration is different from that in the presence of KCl. The thermodynamic parameters of the discoloration are calculated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.