Electrochemical decolorization of Methylene blue at Pt electrode in KCl solution for environmental remediation

摘要

Electrochemical decolorization of Methylene blue (MB) molecules was studied at Pt electrode in presence of KNO3 and KCl as the supporting electrolytes under acidic condition. The KNO3 electrolyte displayed MB decolorization effect, where MB molecules exhibited two redox peaks at -0.48 V and -0.34 V, respectively, in cyclic voltammogram (CV). The features of redox couples indicated the dimerization of MB molecules. In this simple preparation technique, a less amount of sample loading was required, and the method displayed high efficiency toward decolorization of MB dye. This report indicates the possibility for improving the quality of wastewater discharged from textile and other industries. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.