EXTRACTION DU PLOMB (II) PAR DES MEMBRANES POLYMÈRES À INCLUSION EN UTILISANT L'ALIQUAT 336 COMME TRANSPORTEUR/Lead (II) extraction by polymer inclusion membranes using Aliquat 336 as a mobile carrier

Polymeric membranes used for the selective transport and separation of metal species have emerged in recent years. In this work, the extraction and transport of Pb(II) in polymeric membranes (PM) using Tricapryl-methylammonium chloride as a mobile carrier has been investigated. The optimum conditions of liquid-liquid extraction were determined. The liquid -- liquid extraction tests showed a maximum extraction when the agitation time was greater than eight minutes. A good elimination of lead (extraction efficiency 80% to 94%) was observed. A membrane was prepared consisting of cellulose triacetate (CTA) modified by Aliquat 336 incorporated into the polymer as carrier; tris(2-ethylhexyl) phosphate (TEHP) was included as a hydrophobic plasticizer. The results indicate that facilitated transport through plasticized membranes is an attractive and effective way to solve the long-standing problem of membrane stability, while improving the permeability to metal ions.