Liquid-liquid extraction of Au(I) by Amberlite LA2 and its application to a polymer-immobilized liquid membrane system

被引：0
作者：
F. J. Alguacil
M. Alonso
机构：
[1] Ciudad Universitaria,Centro Nacional de Investigaciones Metalúrgicas (CSIC)
来源：
Gold Bulletin | 2005年 / 38卷
关键词：
Liquid-liquid extraction; Membrane transport; Gold (I); Amberlite LA2;
D O I：
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学科分类号：
摘要：
The liquid-liquid extraction of Au(I) by Amberlite LA2 (secondary amine) in kerosene from cyanide media has been investigated. The analysis of metal distribution data suggested the formation of R2NH2+Au(CN)2-species in the organic phase with formation constant log Kext=6.5 ± 0.03, whereas the use of mixtures of the amine with a solvation extractant (e.g. a phosphine oxide) shifted the gold-pH1/2 extraction towards more alkaline values. The results obtained on Au(I) distribution have been implemented in a polymerimmobilized liquid membrane system, using NaOH solutions (e.g. 0.01 mol/L) to strip the metal from the organic phase.
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页码：68 / 72
页数：4
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