DUAL-TEMPERATURE ION EXCHANGE FRACTIONATION

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...

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Bibliographic Details
Published inSolvent extraction and ion exchange Vol. 17; no. 4; pp. 767 - 849
Main Authors Muraviev, Dmitri, Noguerol, Joan, Valiente, Manuel
Format Journal Article
LanguageEnglish
Published United States Taylor & Francis Group 01.07.1999
Subjects
ACID MINE DRAINAGE
COPPER
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ENVIRONMENTAL SCIENCES
FRACTIONATION
ION EXCHANGE
ION EXCHANGE MATERIALS
MAGNESIUM
MATERIALS RECOVERY
SEAWATER
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE
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Summary: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 waters. The flowsheets of DTLXF processes are proposed and discussed.
ISSN:0736-6299
1532-2262
DOI:10.1080/07366299908934635