Effective Removal of Acid Blue 113 Dye Using Magnesium Oxide-based Nanocatalyst in Photocatalytic Ozonation Process

In this study, photocatalytic ozonation process was used to remove Acid Blue 113 dye from the dye solution. The catalyst applied in the process was the three-component nanocomposite Fe2O3/MgO/MoS2, which was synthesized by hydrothermal method for the first time and then identified by various methods. To analyze and optimize the parameters of the photocatalytic ozonation process, response surface methodology (RSM) was employed using the Box-Benken design. The results show that time, pH, and amount of the catalyst are the parameters that influence dye removal. The optimal conditions for these variables to remove dye solution with a concentration of 25 mg/l include pH 2.27, 8.6 mg of the catalyst, ozone flow of 0.2 mg/l.h in 26 min. Under these conditions, the proposed process removed 99.3 % of the dye. In addition, the nanocatalyst showed high reusability and stability (92 %) after eight consecutive use cycles. According to the results, the synthesized nanocomposite can be used in the catalytic ozonation process to treat industrial dye-containing effluents.