Abstract
Batch experiments were carried out to investigate the influence of gamma irradiation and an iron-reducing bacterium (Shewanella putrefaciens) on the sorption of uranium by goethite in an anoxic condition. Samples were irradiated using a Co-60 gamma source for 5 days at a dose rate of 2 Gy/h for a total dose of 230 Gy. The ionizing radiation and microbial activity may induce the reductive dissolution of goethite, which subsequently may influence the redox behavior of uranium in a deep geological environment. Moreover, gamma irradiation improves the microbial activity, which resulted in the increase of the sorption of uranium.
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