| 零价铁还原土壤中邻硝基甲苯的实验研究 |
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| 引用本文： | 谢凝子,吴双桃,邱罡,陈少瑾.零价铁还原土壤中邻硝基甲苯的实验研究[J].环境科学与技术,2009,32(9). |
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| 作者姓名： | 谢凝子 吴双桃 邱罡 陈少瑾 |
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| 作者单位： | 韩山师范学院环境化学应用技术研究所,广东,潮州,521041 |
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| 基金项目： | 广东省自然科学基金委项目 |
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| 摘 要： | 采用零价铁(ZVI,Fe0)还原技术,在常温常压下修复邻硝基甲苯(ONT)污染的土壤,研究不同反应条件对还原效果的影响及产物随时间的变化。实验结果表明,Fe0能够有效地将土壤中的邻硝基甲苯还原为邻甲基苯胺(OMA),反应过程中先生成邻甲基亚硝基苯,再进一步还原为邻甲基苯胺。当ONT的初始浓度约为2.5×10-6mol/g,Fe0加入量是25mg/g,土壤水含量75%,土壤初始pH值6.8,于25℃反应5h,ONT的还原率可达97%。Fe0用量、土壤含水量、土壤初始pH值和温度均对Fe0还原ONT产生影响,增加Fe0用量、较饱和的土壤含水量、偏酸性土壤和较高的温度能显著提高其还原率。
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| 关 键 词： | 零价铁 土壤 邻硝基甲苯 还原 |
Experimental Study on Reduction of O-Nitrotoluene by Fe~0 in Soil |
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| XIE Ning-zi,WU Shuang-tao,QIU Gang,CHEN Shao-jin.Experimental Study on Reduction of O-Nitrotoluene by Fe~0 in Soil[J].Environmental Science and Technology,2009,32(9). |
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| Authors: | XIE Ning-zi WU Shuang-tao QIU Gang CHEN Shao-jin |
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| Institution: | Research Institute of Environmental Chemistry and Technology;Hanshan Normal University;Chaozhou 521041;China |
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| Abstract: | This study intends to develop a technique for remediation of o-nitrotoluene(ONT) contaminated soil at ambient temperature and pressure.Zero-valent iron(Fe0)can finally turn o-nitrotoluene into o-methy-aniline which is comparatively bio-degradable.The experimental result shows the reduction efficiency is as high as 97.14% after the duration of five hours at the temperature 25℃ with the initial ONT concentration of 2.5×10-6mol/g.Parameters such as soil moisture,acidity and pH as well as temperature can affect the reduction. |
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| Keywords: | zero-valent iron soil o-nitrotoluene reduction |
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