Abstract
The carrier-mediated transport of gold(III), platinum(IV) and palladium(II) through a supported liquid membrane (SLM) has been investigated by the use of trioctylamine (TOA) as a mobile carrier. The transport behavior of precious metals greatly depended on the carrier concentration. At a low TOA concentration, Au(III) was preferentially transported across an SLM from the HC1 feed solution to the HCIO4 product solution. The transport of Pt(IV) and Pd(II) was enhanced with increasing carrier concentration. The separation factor of Au(III) over Pt(IV) and Pd(II) was improved with increasing concentration of HC1 in the feed solution.
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