铁屑还原及微波铁屑诱导氧化降解偶氮染料历程的研究  

Study on degradation process of azo dye by iron internal electrolysis deoxidization and microwave induced oxidation

作　　者：李海燕[1] 曾庆福[1] 

机构地区：[1]武汉科技学院环境科学研究所,武汉430073

出　　处：《环境工程学报》2008年第3期294-298,共5页Chinese Journal of Environmental Engineering

基　　金：国家"863"高技术研究发展计划重大专项资助(2002AA601300);湖北省教育厅重点项目资助(D200617005)

摘　　要：研究了铁屑内电解还原及微波诱导氧化降解偶氮染料的反应历程,采用胶束毛细管电泳法对照跟踪了2种不同降解方法下的中间产物变化。实验结果表明,染料的偶氮键(—N=N—)易被铁屑内电解还原,反应过程中有中间产物苯胺生成。微波诱导铁屑氧化偶氮染料的反应过程中未检测到其他芳环类化合物生成,在微波辐照2 min时脱色率已达90%以上,TOC去除率也高达78%,矿化较为彻底;在微波辐照铁屑诱导氧化降解污染物的同时,也使铁屑自身得以活化再生,提高了铁屑的内电解能力。The degradation of azo dye by iron internal electrolysis deoxidization and microwave induced oxidation were investigated respectively. The intermediate products were analyzed by micellar electrokinetic capillary chromatography. The experimental results indicated that saturated --N = N-- bonds of dyes can be easily deoxidized by scrap iron, and the intermediate product aniline was produced. The microwave induced oxidation can eliminate chroma by 90% , TOC by 78% in two minutes, and aromatic compounds were not detected in the intermediate products. The scrap iron was regenerated by microwave induced oxidation when the pollutant was degraded, and the efficiency of internal electrolysis increased.

关 键 词：铁屑还原 微波诱导 降解过程 偶氮染料 

分 类 号：X703[环境科学与工程—环境工程]