Basic Retention Mechanisms: Part I: Multielement Ion Exchange

Bror Skytte Jensen, H. Jensen

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The effect of multiple cation competition on the adsorption of Sr onto two synthetic ion-exchange resins, i. e. DOWEX 50W and DOWEX CCR-2, as well as onto the clay mineral, kaolinite has been studied. The results for DOWEX 50W, and under certain experimental conditions also for DOWEX CCR-2 were in good agreement with theoretical predictions for multielement ion-exchange taking the limiting effect of ion-exchange capacity into account. In the case of very low cation adsorption, DOWEX CCR-2 showed an unexpected behavior which is interpreted as ion-pair or ion-cluster adsorption of polyvalent ions. The data for kaolinite were similarly interpreted as adsorption of hydroxylated complexes of the polyvalent cations, a mechanism which has previously been suggested for the adsorption of heavy metals onto muds, sludges and organic debris. In the case of kaolinite, indications of additional reactions like chemical transformations and dissolution reactions were observed.
    Original languageEnglish
    Book seriesEuropean Applied Research Reports: Nuclear Science and Technology Section
    Volume7
    Issue number4
    Pages (from-to)481-538
    ISSN0379-4229
    Publication statusPublished - 1986

    Bibliographical note

    Report No. EUR-10423

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