Sorption of Radionuclides 137Cs, 60Co, and 85Sr from Aqueous Solutions with Heat Treated Oil Shale

The products of oil shale processing are of interest as sorbents for the purification of liquid radioactive waste (LRW). The work studies the adsorption and textural characteristics of samples of heat-treated oil shale by the method of low-temperature adsorption–desorption of nitrogen and sorption o...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2021, Vol.63 (5), p.606-612
Main Authors: Koren’kova, O. B., Radkevich, A. V., Toropova, V. V., Saskovets, V. V., Shchebletsova, A. N., Kuznetsova, T. F., Ivanets, A. I.
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Cesium 137
Cesium isotopes
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Heat exchange
Heat treatment
Ion exchange
Low temperature
Nuclear Chemistry
Oil shale
Radioactive wastes
Radioisotopes
Sorbents
Sorption
Strontium 85
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Summary:The products of oil shale processing are of interest as sorbents for the purification of liquid radioactive waste (LRW). The work studies the adsorption and textural characteristics of samples of heat-treated oil shale by the method of low-temperature adsorption–desorption of nitrogen and sorption of radionuclides from aqueous solutions. It is shown that with an increase in the processing temperature of oil shale, their sorption capacity increases during the extraction of 137 Cs and 60 Co radionuclides from aqueous solutions, while the processing temperature does not affect the sorption of 85 Sr. This effect of the treatment temperature on the oil shale sorption parameters is associated with the removal and carbonization of the organic constituent, as well as the different contribution of ion exchange and adsorption processes to the adsorption of 137 Cs, 60 Co, and 85 Sr radionuclides. Therewith the distribution coefficients of radionuclides reaches 10 3 –10 4 cm 3 /g.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362221050088