Transport Facilité du Phénol à travers une Membrane Liquide Supportée contenant l’extractant solvatant le Trioctylphosphine Oxyde (TOPO)

N. Taoualit, K. Boutemak, F. Kaddour-Cherif, F. Abbas, D.E. Hadj Boussaad

Abstract


Abstract: The present study focuses on the removal of phenol (PhOH) present in aqueous solutions using a supported liquid membrane (SLM) composed of a thin crosslinked sheet of polydimethylsiloxane (PDMS) containing the carrier trioctylphosphine oxide (TOPO) diluted in octane. The transfer conditions of PhOH through the SLM were optimazed. The diffusion flux (J), the permeability (P) and the diffusion coefficient (Ddiff) of the complexed species were determined.

Speciation of PhOH species in the supported organic membrane phase (extractant) was also performed using derived theoretical equations to elucidate the stoichiometry and PhOH transport mechanism through the SLM. Thus, the optimal conditions of PhOH transport found are:  in the receiving solution, , . Thus, 90% of phenol is removed. For against, only about 16% of phenol was able to cross the SLM with a diffusion flux J of the order of  and a coefficient of diffusion corresponding to .

Résumé: La présente étude porte sur l'élimination du phénol (PhOH) présent dans les solutions aqueuses en utilisant une membrane liquide supportée (MLS) composée d'une fine feuille réticulée de polydiméthylsiloxane (PDMS) contenant l’extractant-transporteur l'oxyde de trioctylphosphine (TOPO) dilué dans l'octane. Les conditions de transfert des PhOH à travers la MLS ont été optimisés. Le flux de diffusion (J), la perméabilité (P) et le coefficient de diffusion (Ddiff) des espèces complexées ont été déterminés. La spéciation des espèces de PhOH dans la phase membranaire supportée a également été réalisée en s’appuyant sur les équations théoriques dérivées pour élucider la stœchiométrie et le mécanisme de transport des PhOH à travers la MLS. Ainsi, les conditions optimales de transport des PhOH trouvées sont : dans la solution réceptrice, ,  . Ainsi,90% de phénol sont éliminés. Par contre, seuls environ 16% de phénol ont pu traverser la MLS avec un flux de diffusion  et un coefficient de diffusion . 

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