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Bioreduction of uranium using native Enterococcus faecalis and Lactococcus garvieae

The aim of this study is the isolation of the native bacteria from uranium mine with the potency of uranium removal in waste via reduction. The isolates is described as E. faecalis FJ4, L. garvieae FJ5, L. garvieae FJ6 and E. faecalis FJ7 seeing that Grampositive, cocci and facultative anaerobic bacteria. The isolates in the presence of U (VI) aqueous solutions led to formation of a black precipitate under anaerobic condition. ICP analysis of the solution in 2nd and 4th days of incubation indicated successful uranium removal of the solution. Moreover, analysis of the precipitate using UV-vis confirmed the reduction of U (VI) to U (IV). As a conclusion, the native isolates showed the ability of uranium removal from the contaminated wastes with uranium.


Faezeh Fatemi*, Samaneh Jahani, Nooshin Hashemi

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