| 凹凸棒石对水中Fe^2＋的吸附特性研究 |
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| 引用本文： | 范晓为,林少华,何蕙君.凹凸棒石对水中Fe^2＋的吸附特性研究[J].环境科学与管理,2010,35(11):77-79,90. |
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| 作者姓名： | 范晓为 林少华 何蕙君 |
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| 作者单位： | 南京林业大学土木工程学院,江苏南京210037 |
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| 基金项目： | 该研究受南京林业大学2008年高层次人才计划项目 |
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| 摘 要： | 通过静态试验,对凹凸棒石吸附去除水中Fe2＋的特性进行了研究,重点讨论了焙烧和酸化处理对吸附的影响。结果表明,凹凸棒石对水中Fe2＋吸附过程可以班厄姆公式进行拟合。Langmuir吸附等温式可以更好地描述Fe2＋在凹凸棒石上的吸附。当焙烧温度在200℃～400℃,焙烧处理对凹凸棒石吸附去除Fe2＋的影响不明显,当焙烧温度在500℃时,凹凸棒石对Fe2＋的吸附去除率显著降低,这是由凹凸棒石内部结构发生折叠收缩,导致孔道逐步塌陷所致。凹凸棒石对Fe2＋的吸附去除率随着酸化浓度的增加先减小而后增大,在HCl浓度为5 mol.L-1时达到最低。
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| 关 键 词： | 凹凸棒石 除铁 吸附 |
Study on Adsorption Characteristics of Fe2+ by Attapulgite |
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| Fan Xiaowei,Lin Shaohua,He Huijun.Study on Adsorption Characteristics of Fe2+ by Attapulgite[J].Environmental Science and Management,2010,35(11):77-79,90. |
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| Authors: | Fan Xiaowei Lin Shaohua He Huijun |
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| Institution: | (College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China) |
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| Abstract: | Adsorption characteristics of Fe2＋ by attapulgite were investigated experimentally using batch reactor,and the effects of calcination and acid treatment were disscussed in particular.Experiments showed that removal process of Fe2＋ by attapulgite can be described by Bangham Formula.Langmuir model represents the adsorption isotherms well.Heat-treatment temperature has little effect on adsotption capacity of attapulgite for Fe2＋ from 200℃~400℃.And adsotption capacity decreased at 500℃ resulted from degradation of channel structure and adsorption capacity loss of palygorskite.With increasing HCl concentration of acid treating solution,adsorption capacities for Fe2＋ decreased firstly and then increased,a minimum was obtained at 5 mol·L-1 of HCl concentration. |
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| Keywords: | attapulgite iron removal adsorption |
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