Yu Yang, Shu Wang
Novel crystalline actinide materials can be utilized for the immobilization of uranium and transuranium elements at radioactive waste disposal sites; however, their stability and dissolution properties remain inadequately understood. This study aims to investigate the dissolution kinetics of two uranyl borates and one plutonyl borate—UO2B2O4 (UBO), Na[(UO2)B6O10(OH)]·2H2O (NaUBO), and PuO2[B8O11(OH)4] (PuBO)—in the presence of three different ligands: bicarbonate, phosphate, and natural humic acid (HA). These actinide borates were selected due to their diverse topologies, which may affect dissolution rates. The results indicate that, in the presence of bicarbonate, the apparent steady-state concentration of dissolved U(VI) and surface area-normalized dissolution rates were significantly greater for UBO compared to NaUBO. Furthermore, uranyl phosphate was observed to precipitate on the surface of residual particles of UBO and NaUBO when phosphate was present. Notably, the dissolution rate of PuBO in NaNO3 solution exceeded that of both UBO and NaUBO. This research highlights the critical influence of crystalline structures and aqueous ligands on the dissolution of actinide borate crystals.
@article{f4cd04b7-32c7-4d8b-8fb6-ea9e1bb862c2,
title={Dissolution of uranyl and plutonyl borates: Influences of crystalline structures and aqueous ligands},
author={Yu Yang and Shu Wang},
year={2013},
language={en}
}TY - JOUR TI - Dissolution of uranyl and plutonyl borates: Influences of crystalline structures and aqueous ligands AU - Yu Yang AU - Shu Wang PY - 2013 LA - en ER -
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