分子筛固载Fe~(2+)-Fenton法降解水中甲基橙的研究

单因素实验考察了不同Fe2+负载量、甲基橙溶液初始浓度、温度、催化剂用量、pH值以及H2O2浓度对降解率的影响。正交实验优化了降解反应条件,得出各因素影响显著性的先后顺序为:pH值、温度、反应时间、催化剂用量、H2O2浓度。结果表明:在常压、温度为35℃,起始pH值为3.00、H2O2浓度为0.552mmol/L、催化剂浓度为0.83g/L、反应时间为80min的最佳条件下,甲基橙降解率可达98.15%。对催化剂进行了紫外照射处理回收再生,功率100W条件下,照射3h后再生催化剂活性可达原来的80.64%。

Degradation of Methyl Orangein Aqueous Solution by Fe2+ Supported on Zeolite-Fenton Reagent Process

The degradation of methyl orange in aqueous solution by Fe2+ supported on zeolite-Fenton reagent process was studied. The effect of factors including load quantity of Fe2+, initial concentration of methyl orange, temperature, catalyst dosage, pH value and concentration of H2O2 were investigated. The optimal conditions for the degradation efficiency of methyl orange and remarkable sequence of these factors were optimized by orthogonal experiment. Results showed that degradation rate of methyl orange in aqueous solution can reach up to 98.15% in the optimal conditions with concentration of H2O2 0.552mmol/L, concentration of catalyst 0.83g/L, pH 3, reaction temperature 30℃ and treatment time 80min. Catalyst reusability was studied by UV method, with activity of reused catalyst up to 80.64% of the beginning under UV lamp power of 100w.