高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (2): 185.

• 论文 • 上一篇    下一篇

Cyanex 272-Span 80-甲苯乳状液膜迁移分离锌、镉及其它元素的研究

邹长英, 李克安, 童沈阳   

  1. 北京大学化学系, 北京, 100871
  • 收稿日期:1993-02-26 修回日期:1993-06-05 出版日期:1994-02-24 发布日期:1994-02-24
  • 通讯作者: 李克安
  • 作者简介:邹长英,女,35岁,讲师,现在山西职工医学院工作
  • 基金资助:

    国家自然科学基金

Study on Transport and Separation of Zn(Ⅱ) from Cd(Ⅱ)and Other Metal Ions Through the Emulsion Liquid Membrane of Cyanex 272-Span 80-Toluene

ZOU Chang-Ying, LI Ke-An, TONG Shen-Yang   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1993-02-26 Revised:1993-06-05 Online:1994-02-24 Published:1994-02-24

PDF (PC)

被引次数

13

摘要： 用Cyanex 272-Span 80-甲苯乳状液膜研究了Zn2+的迁移行为,在适宜条件下,5min内锌的迁移率达95%以上。而在此条件下,与锌性质相近的镉、铜、钴、镍、汞等金属离子不迁移或迁移率很低。因此,用此乳状液膜体系可将锌与镉及其它常见离子分离。

关键词: 乳状液膜, Cyanex 272, 迁移, 锌, 镉

Abstract: The transport behaviour of Zn(Ⅱ)through the emulsion liquid membrane system of Cyanex 272-Span 80-to luene has been studied.The transport conditions of Zn(Ⅱ) with high efficiency and high speed are as follows:membrane phase:0.020 mol/L Cyanex 272+3% (W/V)Span 80+toluene;outer phase:pH 4-5 with SCN-,ClO4-,NO3-,Ac- and Cl- as mediums;inner phase:H2SO4,EDTA,or HCl in needed concentrations; the volume ratio of emulsion to outer aqueous phase: 1-2.5 mL:10 mL.The transport rate of Zn(Ⅱ)in 5min is above 95%.In this case, Many co-ions, such as Cd(Ⅱ), Co(Ⅱ), Ni(Ⅱ) ,Hg(Ⅱ), Cu(Ⅱ) etc.can only be transported a little through this emulsion liquid membrane.So Zn(Ⅱ) can be separated from these ions with satisfactory.

Key words: Emulsion liquid membrane, Cyanex 272, Transport, Zn(Ⅱ), Cd(Ⅱ)

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