INFLUENCE OF SOME FACTORS ON THE PARAMETERS OF FACILITATED TRANSPORT FOR CHROMIUM IONS ACROSS SUPPORTED LIQUID MEMBRANES CONTAININGMETHYL CHOLATE AS CARRIER

The technique of supported liquid membranes (SLM’s) was used to achieve the facilitated transport of Chromium ions (Cr(VI) and Cr(III), using Methyl Cholate as carrier, widely used for afacilitated transport of carbohydrates. For our (SLM’s), we use toluene as an organic phase and microporousfilm ofPVDF as support.Permeability P and initial flux J0 were determined for different studied factors and the prepared membranes are highly permeable. The mechanism based on the complexation of the substrate by the carrier and the diffusion of the complex (ST) was developed. Theresults of this phenomenon are used to determinethe association constantKassand the apparent diffusion coefficientD*. Thesestudiesshow thattheseparametersKass andD*are changingsignificantly with different studied factors, and better extractionof this substrate is possible