| NUKLEONIKA 2009, 54(2):143-148
BIOACCUMULATION OF URANIUM FROM WASTE WATER
USING DIFFERENT STRAINS OF SACCHAROMYCES CEREVISIAE
Richard Tykva1, Jaroslav Novák1, Eva Podracká1, Karin Popa2
1 Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic,
2 Flemingovo Str., 166 10 Prague 6, Czech Republic
2 Department of Chemistry, “Al. I. Cuza” University, 11 – Carol I Blvd.,
700506 Iaşi, Romania
Five different strains of Saccharomyces cerevisiae were tested for their abilities to accumulate uranium from waste water containing competitive ions. Samples of water passing out from a previous uranium mill were used. The strains tested possess different abilities to accumulate uranium. The kinetics of bioaccumulation, the leaching degree, the influence of cell density and their origin were investigated. Under the applied experimental conditions, more than a half of the total activity (uranium and the decay products) could be accumulated after 60 min contact time of 1 mL S. cerevisiae suspension and 5 mL of water. The other cations present in solution effectively competed for the uranium accumulation. 226Ra and its decay products were completely retained using all tested strains.
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