Abstract
Liquid-liquid extraction and the membrane transport of gold(III) have been studied using trioctylamine (TOA). Gold(III) was efficiently extracted with TOA from an HCl solution. The extracted AuIII was instantaneously stripped by an HClO4 or HNO3 solution, and subsequently re-extracted at a slow rate. The transport of AuIII was performed across a supported liquid membrane (SLM) impregnated with TOA from an HCl feed solution into an HClO4 product solution. Most of the AuIII was transported with a reasonable enrichment factor, closely corresponding to the feed-to-product volume ratio.
