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Elaboration de matériaux hybrides fonctionnalisés de type MOFs pour l’extraction sélective de l’uranium

Damien Rinsant 1 
1 LHyS - Systèmes HYbrides pour la Séparation
ICSM - UMR 5257 - Institut de Chimie Séparative de Marcoule
Abstract : The increase of world energy production involves the research and development of new more efficient and ecofriendly processes for uranium ores valorization. Therefore, the development of new materials for an efficient solid-liquid extraction of U is necessary. In this thesis, the synthesis of materials named Metal Organic Framework (MOF) and their use to the uranium extraction from ores are studied. MOFs are hybrid and crystalline materials showing high performances for uranium extractions in weak acid solutions.In order to answer to this objective, the stability of two type of MOFs has been studied at different contact time in acidic solution simulating the ore leachate. Afterwards, zirconium based MOFs functionalized with two different organic functions have been synthesized and characterized with PXRD, BET, TGA, SEM, FT-IR and NMR. The uranium extraction behavior with three functionalized MOFs has been studied in function of the contact time, uranium concentration, sulfate concentration and pH. The uranium extraction values coupled with spectroscopic analysis of uranium loaded materials afford the understanding of uranium extraction mechanisms for both materials.Keywords: MOFs, organic synthesis, solid-liquid separation, uranium
Keywords : Mof Uranium Extraction
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Damien Rinsant. Elaboration de matériaux hybrides fonctionnalisés de type MOFs pour l’extraction sélective de l’uranium. Autre. Université Montpellier, 2019. Français. ⟨NNT : 2019MONTS062⟩. ⟨tel-02476229⟩

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