Sonochemical Precipitation of Uranium and Lanthanide Oxides and Phosphates

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Sonochemical Precipitation of Uranium and Lanthanide Oxides and Phosphates

Original language description

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.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

CA - Inorganic chemistry

OECD FORD branch

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Project

<a href="/en/project/GAP207%2F11%2F0555" target="_blank" >GAP207/11/0555: Metal Oxides and Phosphates as Nuclear Waste Forms: Sonochemical Precipitation, Thermal Transformations, and Solubility Studies</a><br>

Continuities

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

Publication year

2012

Confidentiality

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