Optimization of Operating Parameters on Color Removal by Fenton Oxidation Process of Wastewater Containing Malachite Green

In this study, a central composite design, which is a response surface methodology module was used to optimize the operating parameters of the Fenton oxidation process on the removal of color from synthetic wastewater containing malachite green. The experiments were carried out using the synthetic malachite green solution at 25 ºC and pH 3.4. Important parameters such as mixing time, Fe2+ concentration (0.01-0.15 mM), H2O2concentration (0,4-4 mM), and malachite green concentration (25-100 mg/L) were optimized via response surface methodology. Maximum color removal yield (99.33%) was obtained at an malachite green concentration of 50.97 mg/L, an Fe2+ concentration of 0.11 mM, an HO2 concentration of 2.14 mM and at 37.70 minute mixing time. Under optimal conditions, the COD removal efficiency was 95%. The results showed that the Fenton process may be used as an effective technology for the removal of color from wastewaters containing malachite green.