摘要：

发展了一种以稀土元素Ce为光催化剂的新型高级氧化技术,研究了其在紫外光辐照条件下对罗丹明B模拟废水的光催化降解性能。考察了染料初始浓度、催化剂用量、溶液pH、共存阴离子等因素对Ce(Ⅲ)/UV体系光催化降解性能的影响。结果表明:在实验条件下,Ce(Ⅲ)/UV体系能有效地催化降解罗丹明B。在Ce(Ⅲ)浓度2.8×10-4mol/L,光照120min的条件下,30μmol/L的罗丹明B脱色率可达94.7%,共存离子NO^3-对该光催化过程有促进作用。

关键词: 罗丹明B, 光催化降解, 脱色率

Abstract:

A new advanced oxidation process has been developed. The photocatalytic degradation of organic dye pollutant Rh B as an objective compound in aqueous solution under ultraviolet irradiation by Ce( Ⅲ) as the catalyst has been reported. The results indicate that the dye wastewater could be rapidly degraded in the process. Various factors affecting photodegradation of Rh B have been studied. The photolysis efficiency is the highest when the concentration of Rh B is 30 μmol /L and concentration of Ce( Ⅲ) is 2.8×10^-4 mol /L after 120 min. The degradation rate of the dye is up to 94.7% with the decreasing of pH; the nitrate as co-existed negative ion significantly accelerates the degradation process.

Key words: Rhodamine B, photocatalytic degradation, decolorization rate

中图分类号: 

• O614.33

• X791