Reduction of pertechnetate by haloalkaliphilic strains of Halomonas

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Abstract

It is shown for the first time that haloalkaliphilic bacteria, isolated from soda-lake environments were capable of reducing Tc(VII)O4- to the Tc(V), Tc(IV) and Tc(III) at pH 10 in carbonate medium, whereas no reduction took place without bacteria or in the presence of dead biomass. After 34 h of incubation, 55% remained as Tc(VII), 36% was found as Tc(IV) and 8% as Tc(V) and after 2 months 80% of the technetium was reduced. Technetium has a toxic effect on bacteria. Reduction of TcO4- was drastically decreased at concentration above 1.5 mM. The microbial reduction has been suggested as a potential mechanism for the removal of Tc from contaminated environments or waste streams. © 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

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Khijniak, T. V., Medvedeva-Lyalikova, N. N., & Simonoff, M. (2003). Reduction of pertechnetate by haloalkaliphilic strains of Halomonas. FEMS Microbiology Ecology, 44(1), 109–115. https://doi.org/10.1016/S0168-6496(03)00018-7

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