Spontaneous redox continuum reveals sequestered technetium clusters and retarded mineral transformation of iron.

ABSTRACT: The sequestration of metal ions into the crystal structure of minerals is common in nature. To date, the incorporation of technetium(IV) into iron minerals has been studied predominantly for systems under carefully controlled anaerobic conditions. Mechanisms of the transformation of iron phases leading to incorporation of technetium(IV) under aerobic conditions remain poorly understood. Here we investigate granular metallic iron for reductive sequestration of technetium(VII) at elevated concentrations under ambient conditions. We report the retarded transformation of ferrihydrite to magnetite in the presence of technetium. We observe that quantitative reduction of pertechnetate with a fraction of technetium(IV) structurally incorporated into non-stoichiometric magnetite benefits from conco

SUBMITTER: Boglaienko D 

PROVIDER: S-EPMC9814752 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature