Removal of Acid Green 20 and Reactive Yellow 17 dyes by aluminum electrocoagulation technique in a single and a binary dye system

Abstract

The present work focuses on the effectiveness of the electrocoagulation technique for the removal of single and binary models of Acid Green 20 (AG20) and Reactive Yellow 17 (RY17) using aluminum electrodes in a batch stirred bi-polar reactor. It was found that the optimum conditions for both models leading to the higher percent removal of the dyes were; pH 2.1, 40 mA/cm2 current density, 0.5 g/L of sodium chloride, and temperature 45 °C. The removal has reached 92.2% and 86.5% in the binary model for RY17 and AG20 and in the single model the removal was 95.4% and 92.7% for RY17 and AG20 dyes respectively. The thermodynamic parameters and adsorption models were evaluated.