Degradation of Acid Orange 10 by the electrofenton process: influence of operating parameters, kinetic, thermodynamic study and statistical properties
摘要
This scientific study aims to explore the optimization of the electrofenton process for the degradation of Acid Orange 10, a representative organic dye, using a platinum anode and a carbon felt cathode. The research systematically investigates the impact of various key parameters on the degradation efficiency, including pH, ferrous sulfate (FeSO4) concentration, electrical current, system temperature, supporting electrolyte concentration, and initial dye concentration. In addition, the study extends its practicality by assessing the process’s performance in real-world matrices, such as river water and seawater. This investigation also delves into dye adsorption into carbon felt and the evolution of hydrogen peroxide concentration over time. The results demonstrated the effectiveness of the process for the rapid and complete elimination of AO10 pollutant. The optimal conditions obtained for complete color removal of an initial dye concentration of 10 mg/L were an electric current of 250 mA, a Fe(II) concentration of 3 mg/L, a Na2SO4 concentration of 0.05 mg/L, and a pH of 3, within 15 min for a solution volume of 350 mL. The study also confirmed that the dye degradation is primarily due to the generation of hydroxyl radicals. This investigation also delves into dye adsorption into carbon felt and the evolution of hydrogen peroxide concentration over time. The results provide valuable insights for tailoring the electrofenton process to effectively treat wastewater containing organic dyes, making it a promising sustainable solution for industrial effluent treatment.