Catalytic oxidation degradation of phenol in wastewater by heterogeneous Fenton reagent

摘要

Heterogeneous Fenton reagent, as a strong oxidizer, has been used widely in the treatment of wastewater. We prepared Fe2O3/γ-Al2O3 catalyst by impregnation method and characterized it by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM). Test results show that Fe2O3 crystal was compounded on the γ-Al2O3 carrier. We tested and optimized Fe2O3/γ-Al2O3/H2O2 and Fe2O3/γ-Al2O3/H2O2 /UV processes to remediate organic material of phenol, using phenol solution with an initial concentration of 250 mg/L as a representative of phenolic industrial wastewater. The preparation conditions were optimized based on performance of Fe2O3/γ-Al2O3 catalyst and the processes to degrade phenol in aqueous environments. The experimental results showed that the phenol removal perfomance with Fe2O3/γ-Al2O3/H2O2 /UV was more complete than with Fe2O3/γ-Al2O3/H2O2 and degradation rate of phenol reached 89.4% and 94.7% respectively after reaction for 2 h.