过氧化氢光催化脱色甲基橙溶液的研究

Studiy on Photocatalytic Decolorization of Methyl Orange with H_2O_2

本文在H2O2存在下用紫外灯照射对甲基橙溶液进行光催化脱色。结果表明,甲基橙溶液的脱色率随着H2O2的增加而增加,但存在一个最佳值。当甲基橙浓度低于25 mg/L时,反应为假一级,当甲基橙浓度高于100 mg/L时,反应为零级;但是不符合Langmuir-Hinshewood动力学模型。脱色率在酸性条件下比碱性条件高。日光照射下对实际染料废水的脱色效果好。

The photocatalytic decolorization of methyl orange with H2O2 under UV irradiation was investigated.The results showed that Decolorization of MO increased with increasing the dosage of the H2O2 and had an optimal amount of H2O2 t in case.The decolorization reaction was a pseudo first-order reaction when the concentration of MO was less than 25 mg/L,the decolorization reaction was a zero-order reaction when the concentration of MO was more than 100 mg/L,but it was inconsistent with Langmuir Hinshewood kinetic model.The decolorization efficiency in acid was superior to that in base.The decolorization efficiency of wastewater of dyes was good under sunlight radiation with H2O2.