EFFECTIVE PHOSPHATE REMOVAL FROM AQUEOUS SOLUTIONS BY ELECTROCOAGULATION WITH ALUMINUM ELECTRODES AND POLARITY REVERSAL MODE

Tóm tắt

Phosphate contamination in wastewater is a leading cause of eutrophication, posing serious threats to aquatic ecosystems and water quality. Mitigating this environmental issue requires the implementation of effective and sustainable treatment technologies. This study explores the application of a polarity reversal electrocoagulation system using aluminum electrodes for the efficient removal of phosphate from wastewater. Process parameters were systematically optimized using response surface methodology, with a central composite design employed to evaluate the interactive effects of current density, electrolysis time, and polarity reversal interval on phosphate removal efficiency. Phosphate percentage removal was selected as the response variable. The experimental data exhibited a strong fit with a quadratic model, indicating the significance of the selected operational parameters. Numerical optimization revealed that the highest phosphate removal was achieved under optimal conditions: current density of 46.8 A/m², electrolysis time of 50 minutes, and polarity reversal interval of 2.26 minutes. These findings demonstrate the potential of the polarity reversal electrocoagulation system as an effective and controllable approach for phosphate removal, offering practical implications for advanced wastewater treatment applications.