高等学校化学学报

高等学校化学学报 ›› 1984, Vol. 5 ›› Issue (3): 404.

• 研究简报 • 上一篇    下一篇

金属离子在冠醚化合物为载体的液膜体系中传输的研究

朱家芹, 杨燕生   

  1. 中山大学化学系
  • 收稿日期:1982-12-28 出版日期:1984-06-24 发布日期:1984-06-24

TRANSPORT OF SOME CATIONS ACROSS THE LIQUID MEMBRANE BY CROWN COMPOUNDS

Zhu Jiaqin, Yang Yansheng   

  1. Department of Chemistry, Zhongshan University, Guangzhou
  • Received:1982-12-28 Online:1984-06-24 Published:1984-06-24

PDF (PC)

被引次数

5

摘要： 液膜分离是近年才发展起来的一种新分离技术[1]。早在1968年Tosteson[2]就已观察到冠醚化合物在人造膜中对K+、Na+离子的选择性与天然大环化合物在细胞膜中的作用具有共同之处。Cussler[3]曾测定了DB-18-C-6为载体的液膜中一些金属离子的传输通量。Lamb[4]比较了以DB-18-C-6、DT-18-C-6及DKP-18-C-6为载体的氯仿液膜中Pb2+/Na+、Pb2+/Ca2+、Pb2+/Fe3+、Pb2+/Zn2+的选择比。

Abstract: Transport rates of La3+,Fe3+,Ca3+,Na+ ions,as well as the amount and selectivity ratio of transport for La3+ , Sm3+ , and Er3+ ions across the liquid membrane by DB-18-C-6 and B-15C-5 were determined.It was found that from a chloride solution the transport rates for Ca2+ , La3+ , Fe3+ and Na+ ions are very small. For DB-18-C-6 as carrier, during 12 hrs., the amount of La3+ and Na+ ions transported are 49.7% and 54% respectively, and the selectivity ratio for Na+/La3+ is about 1.08. For B-15-C-5 as carrier the amount of La3+ and Na+ ions are 47.5% and 54.0% respectively, and the selectivity ratio for Na+/La3+ is about 1.13.While for picrate solution the amount of La3+ , Sm3+ and Er3+ions transported are 24.1%, 46.0% and 14% respectively, and the selectivity ratio for Sm3+/Er3+ , Sm3+/La3+ and La3+/Er3+ are 3.28, 1.91 and 1.72 respectively.

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