Mechanism unravelling for ultrafast and selective ⁹⁹TcO₄ ^- uptake by a radiation-resistant cationic covalent organic framework: a combined radiological experiment and molecular dynamics simulation study.

ABSTRACT: ⁹⁹Tc is one of the most problematic fission products in the nuclear fuel cycle owing to its large inventory in used nuclear fuel, long half-life, potential radiation hazard, high environmental mobility of its major species ⁹⁹TcO₄ ^-, and its redox-active nature. Ideally, ⁹⁹TcO₄ ^- should be removed at the first stage, when the used fuel rods are dissolved in highly concentrated nitric acid solution, which can substantially reduce its interference with the solvent extraction process through catalytic redox reactions with the key actinides and diminish the chance of discharge into the environment as the volatile species during the waste vitrification process. However, this task cannot be achieved by any of the reporte

SUBMITTER: He L 

PROVIDER: S-EPMC6471554 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature