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Selective transport of cesium ion in polymeric CTA membrane containing calixcrown ethers |
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| Authors: | Kim J S Kim S K Ko J W Kim E T Yu S H Cho M H Kwon S G Lee E H |
| Affiliation: | a Department of Chemistry, Konyang University, Nonsan, Chungnam 320-711, South Korea b Department of Chemistry, Kangwon National University, Chuncheon 200-711, South Korea c Korea Atomic Energy Research Institute, Taejon 305-600, South Korea |
| 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 |
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