What is it about?
High pH environments are expected to evolve within and around a radioactive waste repository, where there will be extensive use of concrete as part of the design. To inform the safety case with experimental evidence, tools need to be developed and tested to enable experiments to be performed under such conditions. The diffusive gradients in thin-flms water analysis technique can yield time averaged dissolved concentrations, but to date, its suitability for high pH environments has not been tested. Here we show that the Chelex binding gel is suitable for europium for circumneutral pH, for uranyl up to at least pH 10.7 and for neptunyl up to at least pH 11.7.
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Perspectives
The results of this study also show this may be a potential route to separation of wastes of different oxidation states or to separate different forms of plutonium that is an essential process for research. This short study was prepared by myself to mark the retirement of my PhD supervisor Prof. Bill Davison. It is good to see Bill is still actively publishing in 2018, some 5 years later!
Anthony Stockdale
Read the Original
This page is a summary of: Application of DGT to high pH environments: uptake efficiency of radionuclides of different oxidation states onto Chelex binding gel, Environmental Science Processes & Impacts, January 2013, Royal Society of Chemistry,
DOI: 10.1039/c3em00088e.
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