Application of titanium-containing sorbents for treating liquid radioactive waste with the subsequent conservation of radionuclides in Synroc-type titanate ceramics

Application of titanium-containing sorbents for treating liquid radioactive waste with the subsequent conservation of radionuclides in Synroc-type titanate ceramics

New nanocrystalline titanium-containing sorbents, namely, layered hydrazinium titanate LHT -9, (N 2 H 5 ) 0.5 Ti 1.87 O 4 and synthetic ivanyukite-Na Na 2 K[Ti 4 (OH)O 3 (SiO 4 ) 3 ] · 7H 2 O, possess high sorption capacity towards cations of different valences and, due to their high chemical stabil...

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Bibliographic Details
Published in:Theoretical foundations of chemical engineering Vol. 50; no. 4; pp. 598 - 606
Main Authors: Britvin, S. N., Gerasimova, L. G., Ivanyuk, G. Yu, Kalashnikova, G. O., Krzhizhanovskaya, M. G., Krivovivhev, S. V., Mararitsa, V. F., Nikolaev, A. I., Oginova, O. A., Panteleev, V. N., Khandobin, V. A., Yakovenchuk, V. N., Yanicheva, N. Yu
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-07-2016
Springer Nature B.V
Subjects:
Ceramics
Chemical composition
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Radioactive wastes
Radioisotopes
Selected Articles from the Journal Khimicheskaya Tekhnologiya
Sorbents
Sorption
Titanium
titanosilicate
nanomaterial
Synroc
sorbent
cesium
titanate
europium
strontium
mineral-like ceramics
radioactive waste
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Summary:New nanocrystalline titanium-containing sorbents, namely, layered hydrazinium titanate LHT -9, (N 2 H 5 ) 0.5 Ti 1.87 O 4 and synthetic ivanyukite-Na Na 2 K[Ti 4 (OH)O 3 (SiO 4 ) 3 ] · 7H 2 O, possess high sorption capacity towards cations of different valences and, due to their high chemical stability in acidic and alkaline media, provide the purification of liquid radioactive waste of any composition. The calcination of the product of the radionuclide sorption on LHT -9 and ivanyukite at 1000–1200°C yields mineral-like Synroc-type titanate ceramics applicable for long-term immobilization of sorbed radionuclides with a significant (by 17–250 times) decrease in the amount of radioactive waste.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579516040072