Copper extraction from diluted solutions using hollow fiber supported liquid membranes

Mihaela Caltaru, Nicolae Petrescu, Cristina Vasiliu


The copper extraction from wastewater using hollow fiber supported liquid membrane impregnated with M5640 was experimentally investigated. The permeability coefficients rise by raising the pH of the feed solution. At high concentration of hydrogen ions in the feed solution the process was controlled by diffusion of CuR2 through the liquid membrane. At small concentration of hydrogen ions, the permeability become independently with this factor and the process was controlled by diffusion through the aqueous diffusion layer formed at the interface feed solution-liquid membrane. The experimental studies were in accordance with Danesi model assumptions.

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P.R. Danesi, A simplified model for coupled transport of metal ions through hollow-fiber supported liquid membranes, Journal of Membrane Science, 20, p. 231-248, 1984.

P.R. Danesi, E.P. Horwitz, G.F. Vandegrift, R. Chiarizia, Mass transfer rate through liquid membranes; Interfacial chemical reactions and diffusion as simultaneous permeability controlling factors, Separation Science and Technology, 16 (2), p. 201-211, 1981.


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