Application of DGT to high pH environments: Uptake efficiency of radionuclides of different oxidation states onto Chelex binding gel

Anthony Stockdale, Nick D. Bryan

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    Abstract

    The DGT Chelex binding phase has not been tested for binding efficiency over the extreme high pH range (i.e., 10 to 13). Here, we examined the uptake efficiency of the gel-encapsulated Chelex cation exchange resin binding phase when in direct contact with solutions of radionuclides of different oxidation states over the circumneutral to high pH range (∼7 to 13). Results show that the Chelex binding gel is suitable for Eu3+ for circumneutral pH, for UO22+ up to at least pH 10.7 and for NpO 2+ up to at least pH 11.7. Application may be appropriate at higher pH values but testing of complete solution deployment units will be required. This work provides the framework to use DGT as a tool for the study of high pH radionuclide systems. © The Royal Society of Chemistry 2013.
    Original languageEnglish
    Pages (from-to)1087-1091
    Number of pages4
    JournalEnvironmental Sciences: Processes and Impacts
    Volume15
    Issue number5
    DOIs
    Publication statusPublished - May 2013

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