INTERACTIONS OF ORGANIC MOLECULES AND URANIUM WITH CALCIUM ALUMINUM SILICATE HYDRATES - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

INTERACTIONS OF ORGANIC MOLECULES AND URANIUM WITH CALCIUM ALUMINUM SILICATE HYDRATES

Résumé

Nuclear energy accounted for 10.3% of global electricity production in 2019 and is being considered by some countries as a low-carbon technology for mitigating climate change [1]. Deep geological repositories (DGR) are the most accepted way to safely isolate radioactive waste. In this concept, adsorption is one of the main processes expected to limit transport of dissolved radionuclides. Cements are extensively used as construction and encapsulation materials in repositories. One of the main hydration products of cement is calcium-silicate-hydrate (C-S-H). When fly ash is added to the cement, calcium-aluminate-silicate-hydrate (C-A-S-H) phases can be formed with different structures to C-S-H as well as higher chain lengths [2]. Despite their expected ubiquity in a DGR, the sorption of radionuclides on C-A-S-H phases have received minimal attention. As well as radionuclides, organic materials are also expected to comprise a portion of disposed material. These take on relevance in the context of nuclear waste management, as they can affect both the solubility and sorption behavior of radionuclides. The research described in this work investigates the interaction of three organic molecules (adipate, phthalate, and isosaccharinate, ISA) and uranium with C-A-S-H.
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Dates et versions

cea-04523978 , version 1 (27-03-2024)

Identifiants

  • HAL Id : cea-04523978 , version 1

Citer

Marta Lopez-Garcia, James Begg, Nathalie Mace, Yaana Bruneel, David Garcia. INTERACTIONS OF ORGANIC MOLECULES AND URANIUM WITH CALCIUM ALUMINUM SILICATE HYDRATES. Joint 6th International Workshop on Mechanisms and Modelling of Waste / Cement Interactions & EURAD –WP CORI Workshop, Nov 2023, Prague, Czech Republic. ⟨cea-04523978⟩
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