Abstract
This study investigates the impact of lanthanum (La) and cerium (Ce) doped iridium-ruthenium mixed metal oxide electrodes characterization, optimization and the treatment performance of synthetic waters containing Reactive Black 5 (RB5) dye. The electrodes were coated with brushing method with varying doping levels of La and Ce, specifically at concentrations of 5%, 10%, and 20%. Additionally, a new electrode was developed with a mixed doping of 10% Ce and 10% La, which exhibited the highest efficiency in terms of degradation performance. The research focuses on understanding the roles of La and Ce doping, pH, conductivity, and concentration effects on the electrochemical degradation process. Experiments were conducted across a range of pH values (3, 5, 7, and 9), dye concentrations (50, 100, 300, and 500 ppm), current densities (100, 200, 350, and 600 A.m-²), and conductivities (1500, 3500, 5500, and 10000 µS.cm-1). It was found that the newly developed electrode with 10% Ce and 10% La doping showed the most efficiency results. The findings show significant improvements in pollutant removal and toxicity reduction, highlighting the potential of these doped electrodes in wastewater treatment. The study provides insights into optimizing operational parameters for the effective electrochemical treatment of industrial effluents, particularly in the context of textile industry wastewater.