Fe_2O_3/TiO_2芬顿-光催化协同提高处理废水能力

A Study on Fe_2O_3/TiO_2 Coking Wastewater by Fenton-photocatalysis

通过高温煅烧制备复合光催化剂Fe_2O_3/TiO_2,加入H_2O_2构建芬顿-光催化协同体系,对有机废水进行深度降解处理。实验结果表明,Fe_2O_3含量为3%的复合光催化剂投加量1.0 g/L,H_2O_2浓度30 mmol/L,紫外光照射3 min,20 mg/kg亚甲基蓝溶液降解率为88.6%,比TiO_2单体活性提高5倍,芬顿体系3 min对MB几乎无降解,芬顿-光催化协同极大地提高了处理有机污染物的降解能力。紫外光照射20 min,能降解98.2%的20 mg/kg苯酚溶液,分别是单体TiO_2和芬顿体系活性的3倍和24.5倍。

The composite photocatalyst Fe2O3/TiO2 was prepared by high temperature calcination method,and the Fenton-photocatalytic synergistic system was constructed by adding H2O2 to deeply degrade the organic wastewater.The experimental results show that the degradation rate of 20 mg/kg methylene blue solution was degraded by the composite photocatalyst with Fe2O3 content of 3%at the dosage of 1.0 g·L^-1,H2O2 concentration of 30 mmol·L^-1,UV irradiation and reaction for 3 min.It was 88.6%,which was 5 times higher than the activity of TiO2 monomer.When it reacted for 20 min,it can degrade 98.2%of 20 mg/kg phenol solution,which was 3 and 24.5 times than that of monomer TiO2 and Fenton reaction,respectively.