Actinide-Aluminate Speciation in Alkaline Radioactive Waste

Technical Report · Fri Dec 21 04:00:00 EST 2001

DOI:https://doi.org/10.2172/791358· OSTI ID:791358

Clark, David L ^[1]; Fedosseev, Alexander M

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1. Institute of Physical Chemistry Russian Academy of Sciences

Investigation of behavior of actinides in alkaline media containing AL(III) showed that no aluminate complexes of actinides in oxidation states (IIII-VIII) were formed in alkaline solutions. At alkaline precipitation IPH (10-14) of actinides in presence of AL(III) formation of aluminate compounds is not observed. However, in precipitates contained actinides (IIV)<(VI), and to a lesser degree actinides (III), some interference of components takes place that is reflected in change of solid phase properties in comparison with pure components or their mechanical mixture. The interference decreases with rise of precipitation PH and at PH 14 is exhibited very feebly. In the case of NP(VII) the individual compound with AL(III) is obtained, however it is not aluminate of neptunium(VII), but neptunate of aluminium(III) similar to neptunates of other metals obtained earlier.

• Research Organization: Institute of Physical Chemistry/Russian Academy of Sciences (RU)
• Sponsoring Organization: (US)
• DOE Contract Number: FG07-98ER14940
• OSTI ID: 791358
• Report Number(s): DOE/ER14940; 66995
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDE-ALUMINATE
ACTINIDES
ALKALINE
ALUMINATES
ALUMINIUM
HYDROLYSIS
HYDROXOCOMPLEXES
IONS
NEPTUNATE
NEPTUNIUM
OXIDATION
PH VALUE
PRECIPITATION
RADIOACTIVE WASTE
RADIOACTIVE WASTES
VALENCE