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Evolution of noncrystalline uranium in lake sediments over 3,300 years

Pierre Lefebvre 1 Arnaud Mangeret 2 Alkiviadis Gourgiotis 2 Jean-Pierre Sabatier 3 Pierre Le Pape 1 Olivier Diez 2 Pascale Louvat 4 Pauline Merrot 1 Camille Baya 1 Mathilde Zebracki 2 Pascale Blanchart 5 Emmanuel Malet 3 Didier Jezequel 4 Jean Louis Reyss 3 John Bargar 6 Jerome Gaillardet 4 Charlotte Cazala 2 Guillaume Morin 1
1 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
2 PSE-ENV/ SEDRE/ LELI
3 EDYTEM - Environnements, Dynamiques et Territoires de la Montagne
4 IPGP - Institut de Physique du Globe de Paris
5 PSE-ENV/SEDRE/USDR
6 SSRL SLAC - Stanford Synchrotron Radiation Lightsource
Abstract : The long-term behavior of U in contaminated soils and sediments downstream former U-mines is a widespread environmental challenge. Although reducing subsurface environments are generally considered as favorable for U immobilization, it has been shown that U is often present in the form of potentially labile non-crystalline U(IV) species in contaminated anoxic sediments [e.g. 1-3] and soils [e.g. 4-6]. The fate of such mononuclear or polymeric U(IV) species and their ability to eventually transform into less soluble minerals at the century or millennial scale remains poorly documented, which thus deserves further research to better constrain contaminated sites management.
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Conference papers
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https://hal-irsn.archives-ouvertes.fr/irsn-03523229
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Submitted on : Wednesday, January 12, 2022 - 3:23:18 PM
Last modification on : Friday, January 14, 2022 - 3:09:18 AM

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  • HAL Id : irsn-03523229, version 1

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IRSN | IMPMC | ALLINSP | EDYTEM | AFRIQ | UNIV-SAVOIE | IPGP | SORBONNE-UNIVERSITE | MNHN | INSU | SU-SCIENCES | CNRS | UNIV-PARIS

Citation

Pierre Lefebvre, Arnaud Mangeret, Alkiviadis Gourgiotis, Jean-Pierre Sabatier, Pierre Le Pape, et al.. Evolution of noncrystalline uranium in lake sediments over 3,300 years. GOLDSCHMIDT 2021, Jul 2021, Lyon, France. ⟨irsn-03523229⟩

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