UV/TiO_2/Fenton体系催化氧化降解罗丹明B的研究

Degradation of Rhodamine B by UV/TiO_2/Fenton Catalytic Oxidation System

研究在紫外光照射下,Fenton试剂在纳米级TiO2催化作用下氧化降解罗丹明B的处理效果及机理,分别研究初始反应溶液的pH值、反应时间、FeSO4投加量、H2O2溶液投加量、反应温度、TiO2投加量对处理效果的影响,确定了最优反应条件。对于100 mg/L,500 mL的罗丹明B溶液,当TiO2的投加量为0.03g,18mol/L FeSO4的加入量为5 mL,30%H2O2溶液的加入量为1.7 mL,反应溶液pH值为3时,罗丹明B的去除率随着反应温度的升高而升高,最高去除率达100%。

Fenton reagent was used to degrade rhodemine B in the printing and dyeing water under the ultra-violet light in this paper. The results indicated that 0.03 g TiO2, 5 mL 18 mmol/L FeSO4, 1.7 mL 30%H2O2 added to 500 mL,100 mg/L rhodamine B solution were the optimum condition. The reaction rate was accelerated with the increasing of temperature. The higher the temperature was, the faster the reaction rate was, and the total removed rate could reach 100%.