| 聚丙烯中空纤维膜萃取水溶液中铜离子的研究 |
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| 引用本文： | 左丹英,朱宝库,王绍洪,徐又一.聚丙烯中空纤维膜萃取水溶液中铜离子的研究[J].环境化学,2006,25(1):50-54. |
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| 作者姓名： | 左丹英 朱宝库 王绍洪 徐又一 |
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| 作者单位： | 浙江大学高分子科学研究所,杭州,310027 |
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| 基金项目： | 科技部科研项目
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国家科技攻关项目 |
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| 摘 要： | 研究了聚丙烯中空纤维膜萃取二(2-乙基己基)膦酸(D2EHPA)水溶液中铜离子的工艺条件.结果表明,两相流速、膜面积对萃取率基本无影响;而水溶液的pH值和有机相初始铜离子浓度的改变使萃取率在40%-99%之间变化.整个萃取过程的传质阻力主要来源于D2EHPA和 Cu2 的界面配位络合反应阻力,铜浓度比较高时,传质阻力与铜浓度无关;而当铜浓度降低时,传质阻力随着铜浓度的降低而增大.
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| 关 键 词： | 聚丙烯中空纤维膜 萃取 铜离子 二(2-乙基己基)膦酸 |
| 收稿时间： | 2005-01-07 |
| 修稿时间： | 2005-01-07 |
A STUDY ON MEMBRANE EXTRACTION OF Cu2+FROM AQUEOUS SOLUTION USING POLYPROPYLENE HOLLOW FIBER |
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| ZUO Dan-ying,ZHU Bao-ku,WANG Shao-hong,XU You-yi.A STUDY ON MEMBRANE EXTRACTION OF Cu2+FROM AQUEOUS SOLUTION USING POLYPROPYLENE HOLLOW FIBER[J].Environmental Chemistry,2006,25(1):50-54. |
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| Authors: | ZUO Dan-ying ZHU Bao-ku WANG Shao-hong XU You-yi |
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| Institution: | Institute of Polymer Science, Zhejiang University, Hangzhou, 310027, China |
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| Abstract: | Processing conditions and mass transfer performance were studied for the system of Cu 2 / D2EHPA kerosene using hydrophobic polypropylene hollow fiber membrane modules.Experiment results showed that the extraction efficiency were independent of flow rates of two phases and the areas of membrane extraction.However, pH of aqueous phase and the initial concentration of copper ions in organic phase have direct relation with extraction efficiency. The total mass transfer resistance was controlled by interfacial complexation reaction. The mass transfer resistance was independent of Cu 2 at high copper ions concentration; but at low copper ions concentration, the mass transfer resistance increased as Cu 2 concentration reduced. |
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| Keywords: | polypropylene hollow fiber membrane membrane extraction copper ions di-(2-ethylxyl-phosphoric acid |
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