An Optimized Method Using Light Enhanced Fenton to Treat Highly Toxic Phenol Wastewater

摘要

Phenol wastewater is highly toxic and difficult to degrade. Advanced oxidation processes, including Fenton treatment, can oxidize phenol to H2O and CO2 and help to solve the phenol pollution problem effectively. The reaction parameters using Fenton treatment to degrade phenol wastewater were optimized in this study. The efficiencies of Fenton treatment and light enhanced Fenton treatment were compared. The feasibility of using Fenton treatment to degrade the phenol wastewater was finally discussed. The results indicated that the removal rate of phenol did not changed significantly under mercury lamp irradiation/Fenton oxidation treatment compared to that of the Fenton oxidation treatment. Otherwise, the U V irradiation can greatly improve the efficiency of degradation of phenol wastewater. The optimal conditions for the removal of phenol at 220 mg/L were: hydrogen peroxide at 4.03 mmol, pH value at 2.8 and ferrous sulfate at 0.1543 mmol. The maximum phenol removal rate reached 98.2 %, which clearly indicated the high efficiency and the great potential of this method.