Electrodegradation of Methylene Blue Dye in Water and Wastewater using Lead Oxide/Titanium Modified Electrode

摘要

A modified electrode was prepared by the electrodeposition of a lead oxide layer on a titanium substrate. This electrode was used as an anode for electrocatalytic oxidation process of dyestuff in aqueous solution. The modified electrode was used for electrochemical degradation of methylene blue dye. The results of the electrocatalytic oxidation process of the dyestuff solutions were expressed in terms of the remaining dye concentration and chemical oxygen demand (COD) values. Different operating conditions and factors that affected the treatment process including current density, pH, initial dye concentration, conductive electrolyte and time of electrolysis were studied. The optimum operating conditions for the dye and modified electrode were investigated. This has resulted in complete removal of the dye and COD. The optimum conditions were applied to the treatment of methylene blue dye in real wastewater solutions. These results indicate that the suggested modified electrode was highly efficient in the treatment of effluents containing methylene blue dye with very slight effect of matrix. This electrochemical system is robust in structure and simple in operation. It has the potential to be developed as a feasible and an effective wastewater treatment process.