ISSN:
1588-2780
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The fixation mechanisms of strontium on polyantimonic acid (PAA) were studied in order to choose the best recovery conditions from nuclear wastes. This was performed through the determination of the composition and structure, the kinetics and capacity involving the use of different methods: radioactive tracers, X-ray diffraction, potentiometric measurements. The composition of PAA corresponds to H2Sb2O6·1.5H2O with a cubic pyrochlore type structure. A total exchange leading to SrSb2O6·nH2O is achieved in basic medium, while the capacity is lower in acid and neutral media. The kinetics can be divided into two stages: the first one may be due to a surface phenomenon and the second can be interpreted by a diffusion mechanism into the particle. These results were confirmed by potentiometric measurements. Owing to the rapidity of the first stage of fixation and to the high distribution coefficient, PAA offers a good alternative for column separation from dilute radioactive solutions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02072867
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