Facilitated supported liquid-membrane transport of gold(I) using LIX 79 in cumene
2000
Sastre Requena, Ana María | Madi, A | Alguacil, Francisco José
The permeation of gold(I), as Au(CN)2−, through supported liquid membrane (LM) impregnated with LIX 79 (guanidine derivative) in cumene has been studied. A model is reported describing the transport mechanism which consists of (a) diffusion process through the feed aqueous diffusion layer, (b) fast interfacial chemical reaction and (c)diffusion through the membrane. The mathematical equations describing the rate of permeation are derived to correlate the membrane permeability coefficient with diffusional and equilibrium parameters. The mass transfer coefficient was calculated from the described model as 5.5 × 10−3 cm s−1, and the thickness of the aqueous boundary was later calculated to be 1.3 × 10−3 cm. Good separation of Au(CN)2− against various metallic-cyano complexes was also obtained
Mostrar más [+] Menos [-]This work was supported by CICYT (QUI96-1025) and Comissionat per Universitats i Recerca (SGR 98-00082). Authors gratefully acknowledge Henkel Corp. for supplying LIX 79.
Mostrar más [+] Menos [-]Peer reviewed
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