Actinide-Aluminate Speciation in Alkaline Radioactive Waste

Clark, Dr. David L. ; Fedosseev, Dr. Alexander M.

Institute of Physical Chemistry/Russian Academy of Sciences (RU)

关键词: Ions;    Neptunium;    Neptunium Actinide-Aluminate;    Radioactive Waste;    Neptunate;   

DOI  :  10.2172/791358
RP-ID  :  DOE/ER14940
RP-ID  :  FG07-98ER14940
RP-ID  :  791358

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.