| IDA修饰PEG非有机溶剂液-固萃取体系分离钪(Ⅲ)和镱(Ⅲ) |
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| 引用本文： | 察冬梅,孙小梅,李步海.IDA修饰PEG非有机溶剂液-固萃取体系分离钪(Ⅲ)和镱(Ⅲ)[J].中南民族大学学报(自然科学版),2004,23(3):1-4. |
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| 作者姓名： | 察冬梅 孙小梅 李步海 |
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| 作者单位： | 中南民族大学化学与生命科学学院,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目 (2 94 75 2 19) |
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| 摘 要： | 研究了 Sc和 Yb在亚氨基二乙酸修饰的聚乙二醇 (PEG- IDA)混合 Tween80 -盐水液 -固萃取体系中的分配行为 ,讨论了 PEG- IDA用量、萃取酸度、吐温用量及分相盐种类和浓度对其萃取率的影响 ,筛选出适宜的萃取分离条件 ,控制萃取酸度 ,实现了 Sc和 Yb的分离 .并用 p H电位法在 30℃的 0 .1mol· L- 1 KNO3溶液中 ,测定了PEG- IDA的离解常数以及 PEG- IDA与 Sc和 Yb形成配合物的稳定常数 ,研究了稳定常数与稀土在 PEG- IDA修饰聚合物 -盐水液 -固萃取体系中分配行为的关系 ,并对该体系富集分离稀土的机理进行了初步探讨
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| 关 键 词： | 钪(Ⅲ) 镱(Ⅲ ) 分离 非有机溶剂液-固萃取体系 pH电位法 |
| 文章编号： | 1672-4321(2004)03-0001-04 |
| 修稿时间： | 2004年7月6日 |
Separation of Scandium(Ⅲ) and Ytterbium(Ⅲ) by Liquid-Solid Extraction System Based on Mixed Polymers of PEG-IDA and Tween80 without Organic Solvents |
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| Cha Dongmei Sun Xiaomei Li Buhai Cha Dongmei Assi,College of Chemistry and Life Science,SCUFN,Wuhan ,China.Separation of Scandium(Ⅲ) and Ytterbium(Ⅲ) by Liquid-Solid Extraction System Based on Mixed Polymers of PEG-IDA and Tween80 without Organic Solvents[J].Journal of South-Central Univ for,2004,23(3):1-4. |
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| Authors: | Cha Dongmei Sun Xiaomei Li Buhai Cha Dongmei Assi College of Chemistry and Life Science SCUFN Wuhan China |
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| Affiliation: | Cha Dongmei Sun Xiaomei Li Buhai Cha Dongmei Assi,College of Chemistry and Life Science,SCUFN,Wuhan 430074,China |
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| Abstract: | The distribution behaviors of Sc and Yb in the liquid-solid extraction system based on mixed polymers of PEG-IDA and Tween80 were investigated. The effect of the concentration of PEG-IDA, Tween80, (NH4)_2SO_4 and extraction acidity on the extraction of Sc and Yb was discussed. The separation of Sc and Yb was carried out by controlling the extraction acidity. And the stability constants of PEG-IDA-Sc and PEG-IDA-Yb were determined by using pH titration method. The relationship between the stability constant and the distribution behavior in the system was studied.And the extraction mechanism was tentatively discussed. |
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