Comparison of TiO₂ Thin Film Photocatalytic and Enhanced Photo‐Fenton's Detector for Wastewater Treatment from Power Plants

Abstract Wastewater treatment is considered one of the recent solutions to water shortages if the water is treated efficiently and reaches clean water standards. Here, three advanced oxidation processes, namely the Fenton process, photo‐Fenton process, and photocatalytic TiO 2 NPs thin film were studied in an attempt to reduce chemical oxygen demand (COD) and oil content from power plants’ wastewater using a batch system set‐up. In order to identify the optimum running conditions for Fenton and photo‐Fenton processes, different parameters were studied for each process, including pH, H 2 O 2 concentration, and Fe +2 concentration. The findings showed that a pH value of 3 was the optimum for the Fenton processes, and for the H 2 O 2 and Fe +2 concentrations, the values were 0.5 mL/L and 0.65 g/L, respectively, in a reaction time range of 0–240 min. However, the photo‐Fenton process gave a maximum COD removal ratio of 97.41%, while photocatalytic by nano thin film gave about 61.4%. The reported removal ratios were estimated after finishing the total reaction time, 240 min.