Efficient facilitated transport of lead, cadmium, zinc, and silver across a flat-sheet-supported liquid membrane mediated by lasalocid A

被引：106

作者：

Canet, L ^{[1
]}

Ilpide, M ^{[1
]}

Seta, P ^{[1
]}

机构：

[1] Lab Mat & Proc Membranaires, CNRS, UMR 5635, F-34293 Montpellier 05, France

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2002年 / 37卷 / 08期

关键词：

D O I：

10.1081/SS-120003047

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Flat-sheet-supported liquid membranes incorporating lasalocid A (a natural ionophore) were shown in previous works to achieve the transport of divalent transition metal cations such as Cd2+ and Zn2+ against a proton gradient, which is the driving force behind the process. This transport process has been extended to other metal species such as Pb2+ and Ag+ and also to the case where the two metal species compete for transport. A higher transport flux for Pb2+ as compared to Cd2+ and Zn2+ is observed, which is partly explained by a higher rate of interfacial complexation due to a smaller hydration shell of this species. This effect is confirmed by the data obtained with Ag(I).

引用

页码：1851 / 1860

页数：10

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