Pertraction properties of poly(oxyethylene) diphosphoric and dicarboxylic acids as macroionophores in liquid membrane systems

The properties of poly(oxyethylene) dicarboxylic (POEDC) and diphosphoric (POEDP) acids as macromolecular carriers (macroionophores) of metal cations have been investigated and compared to the properties of poly(ethylene glycol)s. The macroionophores were dissolved in 1,2-dichloroethane forming a fl...

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Published inReactive & functional polymers Vol. 70; no. 7; pp. 463 - 470
Main Authors WODZKI, R, SWIATKOWSKI, M, LAPIENIS, G
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier B.V 01.07.2010
Elsevier
Subjects
Applied sciences
Cations
Circulation
Derivatives
Dissolution
Exact sciences and technology
Exchange resins and membranes
Forms of application and semi-finished materials
Liquid membranes
Macromolecular carriers
Mathematical analysis
Organic polymers
Pertraction
Physicochemistry of polymers
Polymer industry, paints, wood
Polymers
Properties and characterization
Separation
Solution and gel properties
Technology of polymers
Pertraction
Cations
Separation
Macromolecular carriers
Transport properties
Separation capacity
Telechelic polymer
Metal ion
Ion transport
Liquid membrane
Experimental study
Ethylene oxide polymer
Organic solution
Carboxyl group
Ionophore
Comparative study
Pervaporation
Facilitated transport
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Summary:The properties of poly(oxyethylene) dicarboxylic (POEDC) and diphosphoric (POEDP) acids as macromolecular carriers (macroionophores) of metal cations have been investigated and compared to the properties of poly(ethylene glycol)s. The macroionophores were dissolved in 1,2-dichloroethane forming a flowing liquid membrane (FLM) in a multimembrane hybrid system. The system was composed of the FLM circulated between two cation-exchange membranes (CEM) which were applied as the interfacial separators between the organic (FLM) and aqueous feed (Zn2+, Cu2+, Ca2+, Mg2+, K+, Na+ nitrates) and stripping (H2SO4) solutions. Additionally, the FLM was dried continuously by pervaporation of water from its organic phase. The fluxes, selectivity, and separation characteristics have been determined under competitive transport regime. It was found that the pertraction properties of POE derivatives depend on cooperation between ionic end-groups and pseudocyclic structures of the polymer chain. For example, the following typical separation orders have been found for PEG-6000 based macroionophores: PEG-6000:K+>Zn2+,Ca2+,Na+>Cu2+,Mg2+POEDC-6000:K+>Zn2+>Na+,Ca2+,Cu2+>Mg2+POEDP-6000:Zn2+>Cu2+>K+>Ca2+,Mg2+>Na+
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1381-5148
DOI:10.1016/j.reactfunctpolym.2010.03.004