Monitoring bromide effect on radiolytic yields using in situ observations of uranyl oxide precipitation in the electron microscope.

ABSTRACT: During electron microscopy observations of uranium-bearing phases and solutions in a liquid cell, the electron beam induced radiolysis causes changes in the chemistry of the system. This could be useful for investigating accelerated alteration of UO₂ and can be also used to monitor radiolytic effects. Low concentrations of bromide in aqueous solutions are known to reduce the generation rate of H₂O₂ during radiolysis and increase H₂ production. We deduced the presence of radiolytic H₂O₂ by monitoring the formation of a uranyl peroxide solid from both solid UO₂ and a solution of ammonium uranyl carbonate at neutral pH. Additionally, the effect of bromine on water radiolysis was investigated through chemical modellin

SUBMITTER: Buck EC 

PROVIDER: S-EPMC9080531 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature