Sonochemical Precipitation of Uranium and Lanthanide Oxides and Phosphates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F12%3A00066432" target="_blank" >RIV/00216224:14740/12:00066432 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Sonochemical Precipitation of Uranium and Lanthanide Oxides and Phosphates

Popis výsledku v původním jazyce

In this work, we examined feasibility of sonochemical precipitation of lanthanide and uranyl ions from their solutions in organic solvents, such as tetraglyme and triethylphosphate, with the aim of potentially using this procedure for removing radioactive elements from nuclear waste streams. The precipitated compounds should be easily converted to highly insoluble waste forms, such as mixed metal oxides and phosphates, for long-term deposition and safe storage. We used 2,4-pentanedionato (acac) complexes of lanthanide and uranyl ions as initial surrogate models for radionuclides and by sonolysis obtained amorphous precipitates that were converted to particular oxides and phosphates by calcination. All obtained precipitates were characterized by ICP-OESelemental analyses for metal content, nitrogen adsorption/desorption isotherms for surface areas, IR spectroscopy for the identification of residual organic groups, and by SEM images.

Název v anglickém jazyce

Sonochemical Precipitation of Uranium and Lanthanide Oxides and Phosphates

Popis výsledku anglicky

In this work, we examined feasibility of sonochemical precipitation of lanthanide and uranyl ions from their solutions in organic solvents, such as tetraglyme and triethylphosphate, with the aim of potentially using this procedure for removing radioactive elements from nuclear waste streams. The precipitated compounds should be easily converted to highly insoluble waste forms, such as mixed metal oxides and phosphates, for long-term deposition and safe storage. We used 2,4-pentanedionato (acac) complexes of lanthanide and uranyl ions as initial surrogate models for radionuclides and by sonolysis obtained amorphous precipitates that were converted to particular oxides and phosphates by calcination. All obtained precipitates were characterized by ICP-OESelemental analyses for metal content, nitrogen adsorption/desorption isotherms for surface areas, IR spectroscopy for the identification of residual organic groups, and by SEM images.

Druh

O - Ostatní výsledky

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP207%2F11%2F0555" target="_blank" >GAP207/11/0555: Oxidy a fosforečnany kovů jako formy jaderného odpadu: studium sonochemického srážení, tepelných přeměn a rozpustnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů