Fenton法氧化甲基橙溶液的脱色动力学实验研究

实验对甲基橙的Fenton氧化脱色降解反应过程进行了研究,结果表明在pH值为3、反应温度为30℃的反应条件下,Fenton试剂氧化甲基橙溶液脱色反应可以用一级动力学过程来描述,而且其反应速率常数受到亚铁离子初始浓度和过氧化氢初始浓度的影响很大,经过数据拟合分别得到了反应速率常数与亚铁离子初始浓度和过氧化氢初始浓度之间的数学关系。实验还对30℃～60℃不同温度下的Fenton反应过程进行了考察,结果表明不同温度下Fenton氧化甲基橙的脱色反应仍可以用一级动力学过程来描述,而且其反应速率常数受温度变化的影响不大,基本保持恒定。

Kinetics Experiment on Methyl Orange Decolor Behavior by Fenton Process

Degradation of methyl orange by Fenton reaction was studied in pH range of 2.8～3.2,temperature 30～60℃ and for H2O2 and Fe (III)concentrations respectively between 0.5874～5.874mol/L and 0.05～0.5mmol/L. A kinetic model of firstorder was developed to predict the decay of methyl orange at varying reaction conditions. The constant of the first order reaction velocity was affected by the initial concentration of Fe2 + and H2O2. Experimental results also indicated that the temperature was not the significant factor of the reaction.