KIO_4光催化脱色甲基橙的研究  

Photocatalytic Decolorization of Methyl Orange with KIO_4

作　　者：廉安[1] 钟俊波[1] 李建章[1] 曾俊[1] 马迪[1] 孟庆明[1] 

机构地区：[1]四川理工学院,四川自贡643000

出　　处：《环境科学与技术》2008年第10期22-25,共4页Environmental Science & Technology

基　　金：四川省教育厅重大培育项目(07zz020)

摘　　要：以KIO4为催化剂,对甲基橙进行了光催化脱色研究。结果表明甲基橙的脱色率随着催化剂量的增加而增加,但是没有一个最佳的量。当甲基橙浓度低于16mg/L时,反应为拟一级动力学反应,但是反应不符合Langmuir-Hinshewood动力学模型。脱色率在酸性条件下比碱性条件较高。高碘酸钾光催化脱色甲基橙的机理不完全是羟基自由基进攻。Photocatalytic decolorization of methyl orange（MO） with KIO4 was investigated. Results showed that decolorization of MO increased as the dosage of catalyst increased and without an optimal amount of catalyst. The decolorization reaction was a pseudo first-order reaction when concentration of MO was below 16mg/L, but it cannot be described by Langmuir- Hinshewood kinetic model, Decolorization efficiency in acid was better than that in base. Results indicated that mechanism was different from sole hydroxyl radical attacks in MO degradation with H2O2 by UV irradiation.

关 键 词：KIO4 光催化脱色 甲基橙 废水处理 

分 类 号：X132[环境科学与工程—环境科学]