Ding, W orcid.org/0000-0003-3002-5068, Botha, JA, Hanson, BC orcid.org/0000-0002-1720-1656 et al. (1 more author) (2017) Synthesis of calcium monouranate particles via an aqueous route. In: MRS Advances. Scientific Basis for Nuclear Waste Management, 02-06 Nov 2015, Montpellier, France. Cambridge Core , pp. 4123-4129.
Abstract
Large stores of unstable waste uranic materials such as fluorides or nitrates exist internationally due to legacy civil nuclear enrichment activities. Conversion of these uranic materials to layered metal uranates prior to disposal is possible via aqueous quench - precipitation type reactions. Previous studies1 have shown facile in-situ formation of geologically persistent and labile uranate colloids2 under simulated nuclear waste repository conditions, though the effects of local solution metal-uranium ratios on uranate stoichiometry have yet to be covered. This affects our understanding of how key radionuclides present in repository porewaters such as strontium or caesium may be sequestered in these uranate structures. In this work, we demonstrate a synthesis reaction for calcium monouranate particles via rapid anhydrous curing of a sol-gel. We present some results showing aqueous nucleation of uranate nanoparticles and their phase transformations during thermal curing as well as the effects of solution phase calcium loading on uranate phase purity in the cured particles.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Materials Research Society 2017. This is an author produced version of a paper published in a revised form in MRS Advances, Vol. 1, Issue 62 (2016), pp. 4123-4129, DOI: https://doi.org/10.1557/adv.2017.199, published by Materials Research Society and Cambridge University Press. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Earth Surface Science Institute (ESSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Oct 2016 11:58 |
Last Modified: | 18 Jan 2018 18:42 |
Status: | Published |
Publisher: | Cambridge Core |
Identification Number: | 10.1557/adv.2017.199 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:102564 |