Abstract:Removal of trace phenol in wastewater was investigated by hydrogen peroxide-induced photocatalytic degradation process. Mechanism of photocatalytic degradation of phenol was proposed on the base of the change of H2O2 concentrations during degradation process detected by electrochemical sensors. The optimum conditions determined by intensive analysis of parameters affecting photocatalytic degradation were as follow:H2O2 dosage 0.075~0.30 mmol/L, Fe3+ 0.1~0.15 mmol/L and pH of waste water 4~5. Under the optimum conditions, phenol degradation and mineralization rates could reach 95 % and 77 %, respectively when initial phenol concentration was 50mg/L and degrade time lasted 2 h.