硝基苯在温和条件下的电化学还原  

Electrochemical Reduction of Nitrobenzene Under Mild Conditions

作　　者：李玉平[1,2] 曹宏斌[1,2] 张懿[1,2] 陈艳丽[1,2] 

机构地区：[1]中国科学院过程工程研究所,北京100080 [2]中国科学院研究生院,北京100039

出　　处：《环境科学》2005年第1期117-121,共5页Environmental Science

基　　金：国家高技术研究发展(863计划)资助项目(2004AA649340);国家自然科学基金资助项目(30400011)

摘　　要：在温和条件下 (电流密度不大于 1mA/cm2 ,pH4～ 9) ,研究电极材料对水中低浓度硝基苯电催化还原过程的影响 .结果表明 ,S1、S2和AB5电极均能将水中硝基苯高选择地还原为苯胺 ,硝基苯转化率大于 85 % ,苯胺产率大于 75 % .循环伏安和快速线性扫描研究表明 ,硝基苯在S1和S2电极上主要进行直接还原 ,而在AB5电极则主要通过电解产生的氢间接还原 .生物降解实验表明 ,电解产物可以被AN3菌有效降解 .Effect of cathode materials (S1, S2, AB 5, graphite, Ni plate, Fe plate) on the electrochemical reduction of nitrobenzene of light concentration under mild conditions(current density less than 1.0 mA/cm2, pH in the range of 4～9), was experimentally studied. In aqueous solution, S1, S2 and AB 5 electrodes showed high selectivity of nitrobenzene reduction to aniline, with the nitrobenzene conversion and aniline yield being over 85% and 75%, respectively. The results obtained by cyclic voltammograms and single sweep voltammograms showed that nitrobenzene was directly reduced at S1 and S2 electrodes, while reduced by hydrogen at AB 5 electrode. The products electroreduced from nitrobenzene on S1, S2 and AB 5 cathodes could be easily degraded by aniline degrading strain AN3 under aerobic condition.

关 键 词：电化学还原 硝基苯 废水处理 温和条件 

分 类 号：X78[环境科学与工程—环境工程]