%0 Journal Article
%T Liquid-liquid extraction of Au(I) by Amberlite LA2 and its application to a polymer-immobilized liquid membrane system
%A F. J. Alguacil
%A M. Alonso
%J Gold Bulletin
%@ 2190-7579
%D 2005
%I Springer
%R 10.1007/BF03215235
%X 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 ¡À 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.
%K Liquid-liquid extraction
%K Membrane transport
%K Gold (I)
%K Amberlite LA2
%U http://link.springer.com/article/10.1007/BF03215235