Classical-Fenton and Photo-Fenton oxidation of wastewater arising from cosmetic automobile care products

The goal of the study is to investigate Classical-Fenton and Photo-Fenton oxidation from Fenton-based advanced oxidation processes for wastewater treatment arising from cosmetic automobile care products. The main factors that affected Fenton processes (pH, H2O2 doses, Fe2+ doses, and H2O2/Fe2+ ratios) were examined to optimize the operating conditions in batch reactors. The optimal pH values for both systems were found as 3. The optimum experimental conditions were determined as 300 mg/L of Fe2+ dosage, 1050 mg/L of H2O2 dosage and 600/300 of H2O2/Fe2+ ratios for Classical-Fenton; 300 mg/L of Fe2+ dosage, 900 mg/L of H2O2 dosage, and 600/300 of H2O2/Fe2+ rates for Photo-Fenton process. In all these cases, COD removals were obtained as 75% in Classical-Fenton process and around 85% in Photo-Fenton process. The kinetic model results indicated that the experimental data was represented well by Behnajady-Modirshahla-Ghanbery model (R-2 = 0.99) for both Fenton processes. Finally, it is concluded that Classical-Fenton and Photo-Fenton processes were effective for COD removal from cosmetic wastewater. Photo-Fenton process as an oxidative removal process was exhibited more promising results due to rapid degradation, higher removal performance, fewer reagents usage, simple handling, and protecting of process effectiveness.