Electrochemical treatment of Methyl Orange dye wastewater by rotating disc electrode: optimisation using response surface methodology

摘要

In the present investigation, a novel rotating disc electrochemical reactor has been developed to treat Methyl Orange dye effluent. Stainless steel and ruthenium oxide-coated titanium electrodes were used as cathode and anode, respectively. A statistical tool of the Box-Behnken method has been used to design the experimental run and optimisation. The combined effect of the operating parameter on the efficiency of the process has been critically examined. A quadratic model for reduction of chemical oxygen demand has been developed. A maximum of 96% chemical oxygen demand removal was observed under optimum conditions. The degradation mechanism was studied by ultraviolet-visible spectrophotometer, Fourier Transform-infrared and high-performance liquid chromatography. From the present investigation, it has been observed that dyehouse effluent can be effectively treated using the novel electrochemical reactor.