Recovery of Cesium and Strontium from Nitric Acid HLW with a Mixture of Extractants: 18-Crown-6 and 21-Crown-7 Derivatives in Organic Solvents

The processes of solvent extraction of cesium and strontium stable isotopes using solutions of macrocyclic polyethers in organic solvents from nitric acid solutions were studied. The influence of crown ether structure and solvent type on the distribution coefficients of cesium ( D Cs ) and strontium...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2023-08, Vol.65 (4), p.397-403
Main Authors: Koshcheeva, A. M., Rodin, A. V., Anan’ev, A. V.
Format: Article
Language:English
Subjects:
Cesium
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Chlorine
Crown ethers
Mixtures
Nitric acid
Nuclear Chemistry
Polyethers
Radioactive wastes
Solvent extraction
Solvents
Strontium isotopes
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Summary:The processes of solvent extraction of cesium and strontium stable isotopes using solutions of macrocyclic polyethers in organic solvents from nitric acid solutions were studied. The influence of crown ether structure and solvent type on the distribution coefficients of cesium ( D Cs ) and strontium ( D Sr ) was investigated. Extraction systems for the co-extraction of cesium and strontium were tested, in which 1,1,7-trihydrododecafluoroheptanol and chlorine-substituted hydrocarbons were used as solvents. It was shown that there are highest D Cs and D Sr during co-extraction of metals when using a mixture of DTBDB18C6 and DCH18C6. Experimental data prove high selectivity of crown ethers for the extraction of cesium and strontium into a separate fraction when managing radioactive waste.
ISSN:1066-3622
1608-3288
DOI:10.1134/S106636222304001X