15–20 May 2022
Casino Conference Centre
Europe/Prague timezone

Interaction of 137Cs with synthetic geopolymer and cementious materials

16 May 2022, 18:06
3m
Gallery

Gallery

Poster Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management Nuclear Fuel Cycle

Speaker

Dr Pavel Řezanka (Department of Analytical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Praha 6)

Description

When nuclear facilities, all types of radioactive waste are generated, including intermediate and highly active radioactive waste, which cannot be disposed of in current radioactive waste repositories in the Czech Republic. Therefore, it is necessary to find filling materials used in deep repositories that are environmentally safe for a long time. The aim of the ALMARA project is to study and test these materials.
The subject of this work is the sorption of cesium in cementitious materials and synthetic geopolymers, the determination of the equilibrium time required for the sorption of $^1$$^3$$^7$Cs. The batch experiment was carried out with a solution of $^1$$^3$$^7$CsCl in synthetic granite water on a synthetic geopolymer, hardened cement paste, cement mixed with iron nanoparticles (1% by weight) or bentonite (20% by weight). These materials were used in two different particle sizes (mesh fractions less than 0.5 mm and mesh fractions between 1 and 2 mm) and two different liquid-solid ratios (5 and 10 ml/g). Partition coefficients were calculated to compare these materials.

Acknowledgment
The work described herein was funded by the ALMARA project – Technology Agency of the Czech Republic – FW01010115.

Primary authors

Mr Václav Znamínko (Department of Analytical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Praha 6) Dr Martin Člupek (Department of Analytical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Praha 6) Dr Petr Večerník (ÚJV Řež, a. s., Hlavní 130, 250 68 Husinec-Řež) Dr Pavel Řezanka (Department of Analytical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Praha 6)

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