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Recovering copper ions from industrial environments by supported liquid membranes: parameters and mechanism

Abstract : The technique of supported liquid membranes (SLM) was used to study the facilitated extraction of Cu(II) ions from acidic solutions, with tri-octhyl amine (TOA), methyl Cholate (MC) and Trin-octyl phosphine oxide (TOPO) as carriers , toluene as organic phase and a flat film of polyvinylidene difluoride (PVDF) as hydrophobic support (0.45 μm pore) . The macroscopic parameters, permeability P and initial flux J0 related to facilitated extraction of these ions have been determined, for the three carriers and different initial concentrations of Cu (II) ions, we have observed a net evolution of these parameters. To explain extraction phenomena of these ions by this membrane type (SLM), a mechanism based on the complexation of Cu (II) ions by the carrier and the diffusion of the formed complex through the SLM organic phase has been developed. Experimental results verify this mechanism and allow to find the optimum carrier, and to determine the values of microscopic parameters, association constant Kass and apparent diffusion coefficient D*, relating to the migration of the complex substrate-carrier, through the membrane phase
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02370184
Contributor : Laurent Lebrun <>
Submitted on : Tuesday, November 19, 2019 - 12:40:45 PM
Last modification on : Thursday, July 2, 2020 - 3:29:28 AM

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  • HAL Id : hal-02370184, version 1

Citation

Tarik Eljaddi, Abdelkhalek Benjjar, Oussama Kamal, Mohammed Riri, Laurent Lebrun, et al.. Recovering copper ions from industrial environments by supported liquid membranes: parameters and mechanism. Moroccan journal of chemistry, Université Mohamed Premier, 2015, 3 (1), pp.1-7. ⟨hal-02370184⟩

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