Sorption of NdF3 and ThF4 with Activated Carbons and Zeolites from LiF–NaF–KF Molten Salts

Sorption of neodymium and thorium fluorides with activated carbons and zeolites of various grades from LiF–NaF–KF molten alkali metal fluorides was studied. It is shown that neodymium fluoride is sorbed more efficiently than thorium fluoride with both zeolites and activated carbons. The experimental...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2022-06, Vol.64 (3), p.308-314
Main Authors: Fedorov, Yu. S., Samonin, V. V., Zotov, A. S., Khrylova, E. D., Spiridonova, E. A., Miroslavov, A. E., Akatov, A. A.
Format: Article
Language:English
Subjects:
Acidic oxides
Activated carbon
Basic oxides
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Lithium fluoride
Metal fluorides
Molten salts
Neodymium
Nuclear Chemistry
Potassium fluoride
Sodium fluoride
Sorbents
Sorption
Thorium
Thorium fluorides
Zeolites
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Summary:Sorption of neodymium and thorium fluorides with activated carbons and zeolites of various grades from LiF–NaF–KF molten alkali metal fluorides was studied. It is shown that neodymium fluoride is sorbed more efficiently than thorium fluoride with both zeolites and activated carbons. The experimental data of the Nd(III) sorption isotherm by NaX zeolite are approximated by the Freundlich equation, in contrast to the sorption with AG-3 coal, where the data are described by the Langmuir equation. Possible variants of sorption mechanisms for various sorbents are considered. For Nd(III), a correlation was found between the sorption properties of carbons of different grades for the ratio of acidic and basic oxides per unit surface.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362222030079