树脂负载高价铁催化H2O2降解橙黄Ⅳ

Degradation of dye Orange IV solution over FeⅣ-loaded resin in the presence of H2O2

摘要:

为提高多相类芬顿反应的速率,采用高价铁氧化合物(FeIVF=O/R)为催化剂,强化H2O2分解降解橙黄IV.探讨初始pH值、温度、过氧化氢初始浓度和橙黄IV初始浓度等对反应速率的影响.结果表明:随着pH值升高,橙黄IV降解率下降.在pH值3～10的范围内,能有效地对橙黄IV进行降解.催化H2O2降解橙黄IV的反应遵循一级反应动力学,反应活化能为59.94kJ/mol.反应速率常数与H2O2的初始浓度及与橙黄IV初始浓度都具有很好的正相关性.催化剂重复使用表明铁在树脂表面负载比较牢固,具有较好的稳定性和耐用性.

Abstract:

In order to increase the reaction rate of the heterogeneous Fenton-like,the catalyst FeIVF = O/R was used to catalytically decompose H2O2 for the removal of Orange IV in aqueous solution.The effect of initial pH,temperature,initial H2O2 concentration and initial Orange IV concentration on the reaction rate was discussed.It is found that the reaction rate decreases with the increase of pH.The degradation of Orange IV can be effective at pH range of 3-10.This reaction follows pseudo-first-order kinetics.The activation energy for FeIVF/R catalyzed oxidation of Orange IV is determined to be 59.94 kJ/mol.The reaction rate is positively proportional to initial H2O2 concentration and initial Orange IV concentration respectively.Repeated use of catalyst does not decrease the removal rate of Orange IV.