Stability of Studtite in Saline Solution: Identification of Uranyl-Peroxo-Halo Complex.

ABSTRACT: Hydrogen peroxide is produced upon radiolysis of water and has been shown to be the main oxidant driving oxidative dissolution of UO₂-based nuclear fuel under geological repository conditions. While the overall mechanism and speciation are well known for granitic groundwaters, considerably less is known for saline waters of relevance in rock salt or during emergency cooling of reactors using seawater. In this work, the ternary uranyl-peroxo-chloro and uranyl-peroxo-bromo complexes were identified using IR, Raman, and nuclear magnetic resonance (NMR) spectroscopy. Based on Raman spectra, the estimated stability constants for the identified uranyl-peroxo-chloro ((UO₂)(O₂)(Cl)(H₂O)₂^-) and uranyl-peroxo-bromo ((UO₂)(O

SUBMITTER: Li J 

PROVIDER: S-EPMC9175179 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature