| 镍/铁二元金属对莠去津脱氯特性的影响 |
| 摘要点击 1082 全文点击 1783 投稿时间：2003-02-28 修订日期：2003-05-13 |
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| 中文关键词 Ni/Fe二元金属 莠去津 催化 还原 脱氯 |
| 英文关键词 Ni/Fe bimetallic particles atrazine catalytic reductive dechlorination |
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| 中文摘要 |
| 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,1.22%(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22.21%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. |
| 英文摘要 |
| 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. |
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