镍/铁二元金属对莠去津脱氯特性的影响  

Reductive Dechlorination of Atrazine by Ni/Fe Bimetallic Particles

作　　者：魏红[1] 李克斌[1] 童少平[1] 刘维屏[1] 

机构地区：[1]浙江大学环境科学研究所,杭州310029

出　　处：《环境科学》2004年第1期154-157,共4页Environmental Science

基　　金：国家自然科学基金资助项目 ( 3 0 2 70 767)

摘　　要：为了考察Ni/Fe二元金属对莠去津的催化还原特性 ,分别以Fe粉和Ni/Fe体系作为还原和催化剂 ,在酸性条件下对莠去津的脱氯特性进行比较 ,并讨论了 pH值 ,Ni/Fe配比以及金属添加量等因素对莠去津脱氯效率的影响 .结果表明 :与Fe粉比较 ,Ni/Fe体系对莠去津具有很明显的催化脱氯特性 .在pH =2时 ,1 2 2 % (W/W )Ni/Fe体系 30min对莠去津的脱氯效率大于 90 % ,相同条件下用Fe粉还原时 ,90min脱氯效率仅为 2 2 2 1% .通过Fe粉和Ni/Fe表面形态的比较以及实验结果的分析 ,对Ni/Fe体系的催化还原脱氯机理进行了初步探讨 .Dechlorination of atrazine under acidic conditions was studied by using Fe and Ni/Fe bimetallic particles respectively for the confirmation of the catalytic role of Ni/Fe. Effect of pH value, Ni/Fe proportion and dosage of metal powder were discussed as well. The results indicated that Ni/Fe bimetallic particles was very effective for dechlorination of atrazine, with the dechlorination efficiencies above 90% by using 1.22%(W/W) Ni/Fe at pH value of 2.0 in 30 minutes, very superior to Fe particle with the dechlorination efficiencies only 22.21% in 90 minutes under the same conditions. By the comparison of the surface morphology of both Fe and Ni/Fe and experimental results, catalytic mechanism of Ni/Fe bimetallic particles was also proposed.

关 键 词：Ni/Fe二元金属 莠去滓 催化 还原 脱氯 

分 类 号：X592[环境科学与工程—环境工程]