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Dual-temperature ion exchange fractionation
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In this article, a dual-temperature ion exchange fractionation (DTIXF) technique is proposed to design a reagentless and wasteless fractionation technology for IX resins with temperature dependent selectivity.Abstract:
This paper reviews the results obtained by studying the dual-temperature ion-exchange fractionation (DTIXF) technique. The DTIXF is based on the use of different affinity at different temperatures of ion exchangers towards ions to be separated. This technique allows to design absolutely reagentless and, as a result, wasteless fractionation technology. The review considers the temperature dependencies of selectivity of commercially available ion-exchange (LX) resins towards components of ionic mixtures of different complexity starting from binary model systems up to naturally existing nonacomponent effluents. A novel approach for predicting the temperature sensitivity of a given LX system is presented and discussed. The same approach has been shown to be applicable for the design of IX resins with temperature-dependent selectivity. The paper also reports the results obtained in the practical application of DTIXF technique for concentration of magnesium from seawater and copper from acidic mine wat...read more
Citations
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Journal ArticleDOI
Ion exchange on resins with temperature-responsive selectivity III. Influence of complex formation stoichiometry on temperature dependence of resin selectivity.
TL;DR: The results of thermostripping experiments carried out for Cu2+-Co2+ exchange have shown that the efficiency of the thermostRIpping process depends on both the interval of working temperatures (deltaT) and its position on the temperature scale.
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Ion exchange on resins with temperature-responsive selectivity: II. Thermo-induced concentration waves in ion-exchange column
TL;DR: In this article, a mathematical model of ion-exchange dynamics of components with dissimilar diffusivities has been developed, and the phenomenon of formation of concentration waves is interpreted within the model as a result of the influence of a local electrical field, arising in the resin phase, from the difference on fluxes of exchanging ions.
Journal ArticleDOI
Application of stimuli responsive polymers for sustainable ion exchange chromatography
TL;DR: In this paper, the potential of temperature responsive and other Stimuli responsive polymers for developing sustainable ion exchange processes is discussed, and the material science and engineering challenges that need to be overcome to bring such processes to industrial application.
Journal ArticleDOI
Application of extraction and ion exchange chromatographic techniques for the separation of metal ion mixtures: problems and perspectives
TL;DR: In this paper, the authors describe new perspectives for the development and wider application of extraction and ion exchange chromatography for separation of metal ion mixtures, including the stabilization of extraction chromatographic materials by different techniques, the evaluation of changes in the behaviour of immobilized reagents (extractants or water-soluble ligands) as compared to those in their free state, and the combination of extraction within one fractionation technique.
Journal ArticleDOI
Dual-temperature ion exchange: A review
TL;DR: In this article, a review for special class of reactant-less ion exchange processes regulated by temperature is presented, where experimental results published before and new data, as well as thermodynamic characteristics of different ion exchange reactions and short theoretical descriptions of equilibrium and dynamics are given along with the demonstration of experimental data.
References
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Book
Lange's Handbook of Chemistry
TL;DR: This encyclopedic work includes authoritative coverage of atomic and molecular structure, organic chemistry (revised), inorganic, analytical, and electro- chemistry, mathematics as applied to chemistry, and more.
Book
Ion exchange and solvent extraction
TL;DR: Ion exchange and solvent extraction, ion exchange and extractor extraction, Ion exchange, solvent extraction as mentioned in this paper, ion exchange, and extraction of ion exchange from water, are discussed in this paper.
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The Exchange Adsorption of Ions from Aqueous Solutions by Organic Zeolites. I. Ion-exchange Equilibria1
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Pyridinderivate als Komplexbildner. XI†. Die Thermodynamik der Metallkomplexbildung mit Bis-, Tris- und Tetrakis[(2-pyridyl)methyl]-aminen
TL;DR: In this article, the authors studied the thermodynamic properties of metal complex formation with bis-, tris- and Tetrakis[(2-pyridyl)methyl]-amines.