Author/Authors :
Kim، نويسنده , , Jong Seung and Kim، نويسنده , , Sun Kyu and Ko، نويسنده , , Jong Won and Kim، نويسنده , , Eun Tae and Yu، نويسنده , , Sang Hyok and Cho، نويسنده , , Moon Hwan and Kwon، نويسنده , , Seon Gil and Lee، نويسنده , , Eil Hee، نويسنده ,
Abstract :
A series of calixcrown ethers for which the cavity size of the crown ring is varied from crown-6 to crown-7 to crown-8 were examined for the transport abilities toward alkali metal ions. These ligands were incorporated into supported liquid membranes (SLMs) and into polymer inclusion membranes (PIMs) composed of cellulose triacetate (CTA) as a support and 2-nitrophenyl octyl ether (NPOE) and tris(2-butoxyethyl) phosphate (TBEP) as a plasticizer. In both membrane systems, calixcrown-6 showed the best selectivity toward a cesium ion over other alkali metal ions. The polymeric CTA membrane showed more rapid transport rate as well as higher durability than did the SLMs.
Keywords :
Calixcrown ether , MEMBRANE , Transport experiment , Polymer inclusion membrane
