Treatment of analog azo dyes wastewater methyl orange solution by RuO₂-IrO₂/Ti electrode

Using a home-made stable anode with Ti-base and RuO₂-IrO₂-coating, electro-catalytic oxidation was applied to treat analog azo dyes wastewater methyl orange solution. The investigation focused on the effects of electrolysis time, electrode interval, current density and electrolyte concentration on the removal of methyl orange in the electrolytic process. Also, the causes were analyzed. The experiments show that the methyl orange removal rate is up to 90.0% under the condition of natural pH, electrode interval of 1.0 cm, current density of 30.0 mA/cm², electrolyte concentration of 20.0 g/L, electrolysis of 1.0 h. Therefore, as a highly efficient, easy dye wastewater treatment technology, the electro-catalytic oxidation method has certain application potential.