Abstract
Composite sorbents based on the nanoparticles of NiO, NiO–TiO2 and ZrO2–TiO2 embedded in polyacrylonitrile were chosen for the treatment of spent decontamination solutions based on citric acid. Active oxidic materials were prepared by photoinduced synthesis (NiO, NiO–TiO2) or hydrolytic method (ZrO2–TiO2). Weight distribution ratios for radionuclides 241Am, 60Co, 137Cs and 90Sr/90Y were investigated during the experiments performed in pH range 2–12. High sorption capacities up to 9 mmol g–1 for 137Cs were found by sorption isotherm experiments. Dynamic experiments were carried out with simulated spent decontamination solutions containing citric acid. Elution of > 85% radionuclide waste with mineral acids or complexing agents was in 5–6 times lower volume compared to treated spent solution.
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This project was supported by the Ministry of Interior of the Czech Republic under contract No. VI20172020106.
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Fišera, O., Kareš, J., Prouzová Procházková, L. et al. Treatment of spent decontamination solutions based on citric acid with composite polyacrylonitrile: transient metal oxidic nanoparticles sorbents. J Radioanal Nucl Chem 332, 1541–1547 (2023). https://doi.org/10.1007/s10967-022-08598-2
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DOI: https://doi.org/10.1007/s10967-022-08598-2