| Pd/Fe双金属对水中m-二氯苯的催化脱氯 |
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| 引用本文： | 周红艺,徐新华,汪大翚.Pd/Fe双金属对水中m-二氯苯的催化脱氯[J].化工学报,2004,55(11):1912-1915. |
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| 作者姓名： | 周红艺 徐新华 汪大翚 |
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| 作者单位： | 浙江工业大学生物与环境工程学院,浙江,杭州,310032;浙江大学环境工程系,浙江,杭州,310027;浙江大学环境工程系,浙江,杭州,310027 |
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| 基金项目： | 浙江省教育厅资助 (No 2 0 0 3 195 )，浙江省科技计划项目 (No 2 0 0 4C3 40 0 6)共同资助~~ |
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| 摘 要： | 引 言氯代芳烃及其衍生物化学性质稳定 ,易在生物体内累积 ,大多被列为美国EPA环境优先控制污染物 ,一旦进入环境将对人类及其生态环境造成长期威胁 .因此 ,氯代芳烃的治理技术日益引起全球的关注1] .自 2 0世纪 80年代末提出金属铁屑用于地下水的原位修复以来2 ,3] ,用Fe0 还原脱氯已成为一个非常活跃的研究领域 ,特别是应用于地下水修复方面的研究 .Fernando等4～ 7] 将双金属催化剂用于有机氯的催化还原脱氯 ,Fe0 表面的Pd或Ni等金属加速了还原脱氯反应 ,脱氯速率比Fe0 体系快得多 .本研究利用Pd/Fe双金属对m DCB进行了催化还…
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| 关 键 词： | 间二氯苯 脱氯 钯/铁 催化还原 |
| 文章编号： | 0438-1157(2004)11-1912-04 |
| 收稿时间： | 2004-1-4 |
| 修稿时间： | 2004-6-30
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CATALYTIC DECHLORINATION OF m-DCB IN WATER BY Pd/Fe |
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| ZHOU Hongyi,XU Xinhua,WANG Dahui.CATALYTIC DECHLORINATION OF m-DCB IN WATER BY Pd/Fe[J].Journal of Chemical Industry and Engineering(China),2004,55(11):1912-1915. |
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| Authors: | ZHOU Hongyi XU Xinhua WANG Dahui |
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| Abstract: | Pd/Fe bimetallic catalysts were synthesized via chemical deposition and used to treat m-DCB.Batch experiments demonstrated that the Pd/Fe bimetallic particles could effectively dechlorinate m-DCB.The dechlorination efficiency reached 90% at a Pd/Fe loading ratio of 0.02% (mass) and metal to solution ratio 4g∶75ml in 90 min.Dechlorination was affected by several factors such as reaction temperature, pH, Pd/Fe ratio, and the induction of Pd/Fe catalysts.Chlorobenzene represents the partially stable dechlorinated intermediate in the generation of the final product (i.e., benzene), while part of m-DCB was dechlorinated to benzene directly.The dechlorination reaction was believed to take place mainly on the active surface sites of the Pd/Fe bimetallic particles via a pseudo-first order reaction, and the activation energy of this reaction was found to be 96.6 kJ•mol-1. |
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| Keywords: | m-DCB dechlorination Pd/Fe catalytic reduction |
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