| N235二甲苯-醋酸铵-液膜体系萃取Cd(Ⅱ)的研究 |
| Study on Extraction of Cd(Ⅱ) Ions with N235-Xylene-CH3COONH4 Bulk Liquid Membrane |
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| 摘要: 本文研究了反萃剂、料液HCl浓度、温度、N235浓度对N235-二甲苯醋酸铵大块液膜体系迁移Cd2+的影响。当膜相添加不同浓度的表面活性剂Span-80时,测定了膜料液界面的萃取反应表观速率常数k1和膜反萃相界面的反萃取表观速率常数k2,并进行了相应的动力学分析。实验证明,Cd2+的迁移可用两个连续单向不可逆的一级反应来描述。在本文的液膜体系中,Cd2+ |
| 关键词: 大块液膜 镉离子 三烷基胺 迁移动力学 |
| 基金项目: 国家教委留学归国人员启动经费资助(No.教外司留[1997]436) |
| Abstract: The effect of stripping agent, HCl concentration in feed phase, temperature and tricapryl amine (N235) concentration on transport of Cd(Ⅱ) ions through N235-Xylene-CH3COONH4 bulk liquid membrane has been studied. The pseudo-first order rate constants, k1d and k2a, of interfacial reactions in membrane-feed solution interface or membrane-stripping solution interface are determined with bulk liquid membrane, adding Span-80 content in membrane. The kinetics of Cd(Ⅱ) ions transport could be analyzed in the formalism of two consecutive irreversible first order reactions. The transport of cadmium (Ⅱ) ions is coupled with co-transport of H+ ions. |
| Keywords: bulk liquid membrane cadmium ions tricapryl amine transport kinetics |
| 投稿时间：2000-03-17 修订日期：2000-05-02 |
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| 何鼎胜,马铭,王艳,谢青季.N235二甲苯-醋酸铵-液膜体系萃取Cd(Ⅱ)的研究[J].无机化学学报,2000,16(6):893-898. |
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