| 纳米镍/铁去除氯代烃影响因素的探讨 |
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| 引用本文： | 刘菲,黄园英,张国臣.纳米镍/铁去除氯代烃影响因素的探讨[J].地学前缘,2006,13(1):150-154. |
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| 作者姓名： | 刘菲 黄园英 张国臣 |
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| 作者单位： | 1. 中国地质大学(北京)水资源与环境工程北京市重点实验室,北京,100083
2. 国家地质实验中心,北京,100037 |
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| 基金项目： | 中国科学院资助项目;科技部科研项目 |
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| 摘 要： | 氯代烃是地下水中最常检出的有机污染物之一,传统的处理方法去除率很低。近年来随着铁还原技术的发展,纳米铁和纳米双金属也成为一个活跃的研究领域。利用批实验的研究方法以四氯乙烯(PCE)和四氯化碳(CT)为目标污染物,研究纳米镍/铁在去除PCE过程中的影响因素。实验结果表明,在碱性条件下,纳米Ni/Fe对PCE脱氯速率比在酸性和中性条件下脱氯速率更快;纳米Ni/Fe对初始浓度为6·51mg/L的PCE溶液脱氯速率是对初始浓度为20·56mg/L的PCE溶液脱氯速率的1·8倍;对于氯代程度相同的CT和PCE,对CT的脱氯速率明显快于对PCE。
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| 关 键 词： | 四氯乙烯(PCE) 四氯化碳(CT) 纳米镍/铁 反应速率 脱氯反应 |
| 文章编号： | 1005-2321（2006）01-0150-05 |
| 收稿时间： | 2005-11-10 |
| 修稿时间： | 2005-11-21 |
Factors influencing the removal of chlorinated hydrocarbons by nano-scale Ni/Fe |
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| LIU Fei,HUANG Yuan-ying,ZHANG Guo-chen.Factors influencing the removal of chlorinated hydrocarbons by nano-scale Ni/Fe[J].Earth Science Frontiers,2006,13(1):150-154. |
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| Authors: | LIU Fei HUANG Yuan-ying ZHANG Guo-chen |
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| Institution: | 1. Beij ing Key Laboratory of Water Resources and Environmental Engineering ,China University of Geosciences ,Beijing 100083 ,China ;2. National Research Center of GeoAnalysis, Beijing 100037, China |
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| Abstract: | Chlorinated hydrocarbons are commonly detected in groundwaters, and the traditional methods to remove them are not time and cost effective. With an improvement of iron reduction technology, nano-Fe and nano-Ni/Fe have become active research topics in the last two decades. The factors influencing the removal of perchloroethylene (PCE) and carbon tetrachloride (CT) by nano-Ni/Fe have been studied by batch experiments. A comparative study shows that basic condition is more helpful than the acidic and the neutral conditions for the degradation of PCE using nano-Ni/Fe. The reaction rate of the degradation for an initial concentration of 6.51 mg/L is 1.8 times faster than that for an initial concentration of 20.56 mg/L. Although PCE and CT have the same number of chlorine atoms in their molecular structures, the experiment indicates that the dechlorination of CT by nano-Ni/Fe is much faster than that of PCE. |
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| Keywords: | perchloroethyene(PCE) carbon tetrachloride(CT) nano-Ni/Fe reaction rate dechlorination |
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