UV-Fenton试剂作用下甲基橙的降解规律

采用UV-Fenton法降解甲基橙溶液. 结果表明, UV对甲基橙光降解反应的速率起决定性作用; 对H₂O₂浓度、 铁离子浓度以及pH值对甲基橙脱色 率与去除率的影响进行了探 讨; 发现H₂O₂浓度决定甲基橙的去除率, 铁离子浓度是影响降 解速率的主导因素, 而随pH值降低反应速率明显增大. 比较了甲基橙光降解过程中, 色度去除率和总有机碳去除率之间的关系. 实验结果表明， 总有机碳去除率滞后于色度去除率.

Degradation of methyl orange by UV-Fenton reagent

The methyl orange solution was treated by means of the UV-Fenton method. The results show that the concentrations of (H_2O_2) and (Fe~(2+)) and pH value exhibit a great effect on the degradation of methyl orange. The decolorization ratio of methyl orange is determined by the concentration of (H_2O_2), the rate of degradation is determined by the concentration of (Fe~(2+))and increases with the decrease of pH value. Also, the change of TOC of the methyl orange solution with the reaction time is discussed and the rate of degradation is faster than that of TOC removal.