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Applied Radiation and Isotopes
Vol. 89,
2014, Pages: 85–94

Behaviour of 99Tc in aqueous solutions in the presence of iron oxides and microorganisms

Ruta Druteikiene, Benedikta Lukšiene, Dalia Peciulyte, Kestutis Mažeika, Arunas Gudelis, Dalis Baltrunas

Center for Physical Sciences and Technology, Savanorių ave. 231, LT-02300 Vilnius, Lithuania.

Abstract

A set of experiments was performed to determine the factors that influence View the MathML source interaction with Fe-bearing minerals and to explore the effect of microbial activity on the behaviour of Tc(VII) in solution, in the presence of iron oxides under oxidizing medium. Gradual sorption of View the MathML source (aq) onto wustite/magnetite was observed under alkaline conditions (pH 8–9). No pronounced effect of View the MathML source (aq) interaction with hematite was observed in the investigating alkaline systems. At low pH values (2.7–4.5), View the MathML source retention on hematite increases, suggesting that the process is dependent on pH. Sorption of 99Tc (VII) onto hematite at pH 7.6–8.0 was achieved because of the presence of specific microorganisms.

Keywords: Technetium; Wustite/magnetite; Hematite; Microorganism.


 
 
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