Catalytic ozonation to remove methylene blue from wastewater using Fe-loaded reduced graphene oxide

ABSTRACT Catalytic ozonation is an effective technique for the decontamination of organic pollutants from wastewater. This study investigates the use of an iron-coated reduced graphene oxide (Fe-RGO) catalyst. Using SEM-EDS, XRD, and FTIR techniques, the catalyst was characterized. To determine their effect on dye removal efficiency, different conditions, such as catalyst dosage and the role of scavengers, were explored. The catalyst demonstrated good recyclability, maintaining efficiency over five cycles, and the impact of radical scavengers was also analyzed. Results showed that using 0.04 g of Fe-RGO at pH 7 resulted in a 98.1% removal of M.B., compared to 88% with RGO alone. These findings suggest that for wastewater treatment, Fe-RGO significantly improves the efficiency of catalytic ozonation, offering an economical and environmentally friendly solution.