热/可见光联合活化单过氧硫酸氢盐光敏降解罗丹明B

Photo-sensitized degradation of Rhodamine B under visible light irradiation combined with thermally activated peroxymonosulfate

采用可见光/热/单过氧硫酸氢盐(PMS)体系氧化降解罗丹明B。在可见光条件下,考察了溶液温度、p H值、PMS初始浓度对罗丹明B降解动力学的影响。结果表明,在暗反应条件下,升高溶液温度,促进罗丹明B的降解,联合可见光光照,罗丹明B的降解率进一步增大。在酸性条件下,溶液p H值对罗丹明B降解的影响并不显著。在PMS初始浓度保持一定的范围内,罗丹明B的降解率与PMS初始浓度呈现出正相关关系。

The removal of Rhodamine B in Vis / heat / PMS oxidation system was investigated. The effects of temperature,p H,dosage PMS on the degradation kinetics of Rhodamine B under visible light irradiation were evaluated. The results indicate that elevating solution temperature would efficiently accelerate degradation of Rhodamine B. Additional,degradation extent of Rhodamine B would further enhanced combined with visible light sensitization. Under acidic conditions,the influence of solution p H on the removal of Rhodamine B is minimal. Degradation rate of Rhodamine B and initial PMS concentration show positive correlations within certain PMS concentration range.