Selective Metal Ion Sorption and Transport Using Polymer Inclusion Membranes Containing Dicyclohexano-18-crown-6

A novel polymer material composed of cellulose triacetate as support, o-ni-trophenyl octyl ether as plasticizer (solvent), and dicyclohexano-18-crown-6 as carrier was investigated as a solid extractant for metal ion sorption and as a membrane material for ion transport. Selective extraction and tran...

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Bibliographic Details
Published in:Separation science and technology 1997-11, Vol.32 (17), p.2749-2764
Main Authors: Lamb, John D., Nazarenko, Alexander Y.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Exchange resins and membranes
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:A novel polymer material composed of cellulose triacetate as support, o-ni-trophenyl octyl ether as plasticizer (solvent), and dicyclohexano-18-crown-6 as carrier was investigated as a solid extractant for metal ion sorption and as a membrane material for ion transport. Selective extraction and transport of Pb(II), Ga(III), and Fe(III) were observed. The influence of the source solution counterion on sorption and transport processes was investigated. The transport mechanism is discussed in terms of diffusion coefficients (D) and extraction constants (K 1 ). A diffusion-limited transport model has been found to accurately describe metal ion transport by dicyclohexano-18-crown-6 in these systems. The membranes are easy to prepare in the laboratory, and they may be useful in separation and concentration procedures.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496399708002220