Catalytic wet hydrogen peroxide oxidation of H-acid in aqueous solution with TiO2–CeO2 and Fe/TiO2–CeO2 catalysts Original Research Article

TiO2–CeO2 and Fe/TiO2–CeO2 catalysts were prepared by the methods of co-precipitation and impregnation, respectively, and evaluated through the catalytic wet peroxide oxidation treatment of H-acid solution in the high concentration aqueous medium under mild experimental conditions. Furthermore, the catalysts were characterized by BET, XRD, SEM-EDX and TEM. The results showed that iron-containing samples were comparatively more active, Fe/TiO2–CeO2 (Ti/Ce 9/1, 2 wt.% Fe) was a very efficient catalyst to oxidize the pollutants of dye industry such as H-acid into biodegradable species and doping cerium into TiO2 obviously restrained the growth of crystal, greatly enhancing the surface areas of the catalysts. At the reaction temperature of 100 °C, initial pH of 5.0, the atmospheric pressure and the theoretical dosage of peroxide, 98.1% color removal, 89.6% COD and 65.4% TOC reduction with Fe/TiO2–CeO2 catalyst were obtained.