| Summary: | The effectiveness of the electrochemical technique to remove methylene blue (MB) from its aqueous solution was demonstrated in the current investigation. Various electrodes were used to explore the electrochemical process namely: aluminium (Al), copper (Cu) and carbon cloth (CC) as anode while the cathode was carbon cloth to select the highest removal%. Carbon cloth was selected as the best electrode due to its high efficiency for removal of MB dye compared to others. The effects of applied voltage, electrolysis time, and sodium chloride were investigated to identify the optimal conditions. Response surface approaches were used, however, to fully conceptualize how the factors interacted and get the best methylene blue dye elimination percentage using the electrochemical process. Rate constants ranged between 0.163 and 0.345 min-1, demonstrating that high-rate constant accompanied pseudo first order kinetics, which was the dominating model throughout the investigation with high applied voltage and NaCl amount. Consumption energy was considered and measured; it was 0.104 Wh/mg at the maximum value applying 5 V referring that high consumption energy followed by high applied voltage. Utilizing response surface methodology (RSM), the electrochemical operating factor was optimized. The influence of NaCl addition rate, treatment time, and applied voltage were analysed using the optimum model derived from Box-Behnken Design (BBD), which was quadratic with MB removal (R2 = 0.9447). © 2023, Malaysian Society of Analytical Sciences. All rights reserved.
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