光助Fenton反应降解水溶性染料曙红Y脱色研究

STUDY OF PHOTOCATALYSIS DECOLORIZATION OF EOSIN Y BY FENTON'S REAGENT

对水溶性染料曙红Y使用Fenton试剂结合光催化氧化降解褪色的过程进行了研究，对该反应的4种主要影响因素加以分析：染料浓度、Fenton试剂用量、光源、初始pH值。经过系列的研究分析得出了曙红Y降解的最佳降解条件，并对Fenton试剂光催化氧化反应机理进行了初步探讨。实验结果表明：太阳光照射能有效地促进曙红Y的降解褪色（脱色率大于95％），明显缩短褪色时间，节约氧化剂的用量。当Fe^2＋浓度在3．50×10^-5～7．19×10^-5mol／L之间以及H2O2的摩尔量为染料摩尔量的50～100倍时，太阳光光照能有效地促进0．10g／L以下浓度的曙红Y的降解。

In this paper, the photocatalysis degradation and deeolorization of water soluble dye- Eosin Y under natural sun light and 450W high pressure Hg - lamp irritation in the presence of photo - catalyst Fenton＇s reagent were studied. 7 factors were researched, namely： concentration of Eosin Y, dosage and ratio of Fenton＇ s reagent, light source, original pH value of the solution and the addition of other chemicals. Through experiments the optimum condition for the decolorization of Eosin Y was decided. Experiments show that sun light can promote this reaction apparently （ percentage of decolorization is more than 95% ）. The reaction time can be shortened and the dosage of Fenton＇s reagent was saved.