Author(s)

Abdelkhalek Benjjar, Tarik Eljaddi, Oussama Kamal, Laurent Lebrun, Miloudi Hlaibi

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Laboratoire Interface Matériaux et Environnement (LIME), Faculté des Sciences A?n Chock, Université Hassan II, Casablanca, Maroc.

The technique of supported liquid membranes was used to achieve the facilitated transport of Cr(III) ions, using tow amphiphilic carriers, the methyl cholate and resorcinarene. For prepared SLMs, toluene as organic phase and film of polyvinylidene difluoride, as hydrophobic polymer support with 100 μm in thickness and 0.45 μm as the diameter of the pores. The macroscopic parameters (P and J₀) on the transport of these ions were determined for different medium temperatures. For these different environments, the prepared SLMs were highly permeable and a clear evolution of these parameters was observed. The parameter J₀ depended on the temperature according to the Arrhenius equation. The activation parameters, Ea, ΔH^≠ and ΔS^≠, for the transition state on the reaction of complex formation (ST) , were determined. To explain these results for this phenomenon, and achieve a better extraction of the substrate, a model based on the substrate complexation by the carrier and the diffusion of the formed complex (ST) was developed. The experimental results verify this model and determine the microscopic parameters (K_ass and D^*). These studies show that these parameters K_ass and D^* are specific to facilitated transport of Cr(III) ions by each of the carriers and they are changing significantly with temperature.

Supported Liquid Membrane; Facilitated Transport; Methyl Cholate; Resorcinarene Permeability; Flux; Association Constant; Diffusion Coefficient

A. Benjjar, T. Eljaddi, O. Kamal, L. Lebrun and M. Hlaibi, "Methyl Cholate and Resorcinarene New Carriers for the Recovery of Cr(III) Ions by Supported Liquid Membranes (SLM)s," Open Journal of Physical Chemistry, Vol. 3 No. 3, 2013, pp. 103-114. doi: 10.4236/ojpc.2013.33013.