Modelling of mass transfer in facilitated supported liquid-membrane transport of palladium(II) using di-(2-ethylhexyl) thiophosphoric acid

被引：47

作者：

Rovira, M ^{[1
]}

Sastre, AM ^{[1
]}

机构：

[1] Univ Politecn Catalunya, ETSEIB, Dept Chem Engn, E-08028 Barcelona, Spain

来源：

JOURNAL OF MEMBRANE SCIENCE | 1998年 / 149卷 / 02期

关键词：

supported liquid membrane; palladium(II) permeation; di-(2-ethylhexyl) thiophosphoric acid;

D O I：

10.1016/S0376-7388(98)00191-4

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The permeation of Pd(II) through supported liquid membranes (SLMs) impregnated with di-(2-ethylhexyl) thiophosphoric acid (DEHTPA) in kerosene has been investigated. A model is reported describing the transport mechanism which consists of: diffusion process through the feed aqueous diffusion layer, fast interfacial chemical reaction and diffusion through the membrane. The experimental data are quantitatively explained by mathematical equations describing the rate of transport. Different rate-controlling processes take place as long as the metal transport occurs. High selectivity in the separation of Pd(II) against Fe(III), Pt(IV), Rh(III) and Zn(II) is achieved and the lifetime of the membranes is also studied. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：241 / 250

页数：10

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