Optimization of Effective Parameters in Removal of Acid Blue 25 by Fenton Process with the Aim of Reducing Iron Consumption

Advanced oxidation processes (AOPs) are recognized as the most effective and capable available methods to remove and degrade different kind of dyes. Among various advanced oxidation processes, Fenton process is one of the most effective techniques that are used successfully to remove dyes without producing additional toxic by-products.

In the present study, all experiments were performed in a 500 mL rectangular plexiglass cubic reactor. The effect of different system parameters including pH, [Fe2+] to [H2O2] ratio, initial dye concentration, H2O2 concentration, stirrer velocity and temperature were examined and optimized using one- factor- at- a- time (OFAT) method.

The results obtained from this study showed that Fenton process can remove 96 percent of Acid Blue 25 from aqueous solution. The optimal condition using Fenton process included initial concentration of 150 mg/l, pH= 3, molar ratio of [Fe2+]/[H2O2] = 0.3, stir. vel.= 100 rpm, temperature 43°C and 10 min contact time.

Fenton process is suggested as a suitable method for the removal of Acid Blue 25.