The geochemical role of B-10 enriched boric acid in cemented liquid radioactive wastes

Autor: Mojtaba Rostamiparsa, István Tolnai, Ottó Czömpöly, Margit Fábián, Máté Hegedűs, György Falus, Csaba Szabó, Mihály Óvári, Csaba Tóbi, Péter Kónya, Péter Völgyesi, Zsuzsanna Szabó-Krausz
Rok vydání: 2023
Předmět:
Zdroj: Journal of Radioanalytical and Nuclear Chemistry.
ISSN: 1588-2780
0236-5731
DOI: 10.1007/s10967-023-08913-5
Popis: Boric acid is a significant radioactive waste generated during the operation of nuclear power plants. Cementitious materials have been widely studied for the immobilization of boric acid. The generally used natural boric acid has been replaced by enriched boric acid for geochemical reasons and are expected to have varied behaviors in cementitious matrices. Results showed that simulated enriched/natural boric acid liquid wastes mostly contain boron in $${\mathrm{B}(\mathrm{OH})}_{4}^{-}$$ B ( OH ) 4 - and $${{\mathrm{B}}_{5}{\mathrm{O}}_{6}(\mathrm{OH})}_{4}^{-}$$ B 5 O 6 ( OH ) 4 - ionic forms, but the mass ratio of these species is higher in enriched boric acid solutions. In function with the concentration of enriched/natural boric acid, the solidified cementitious materials show different mineralogy.
Databáze: OpenAIRE
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