Article

Biotechnology Letters

, Volume 17, Issue 4, pp 439-442

First online:

The effect of electric field stimulation on the biosorption of uranium by non-living biomass derived from Kluyveromyces marxianus IMB3

  • N. DonnellanAffiliated withBiotechnology Research Group, School of Applied Biological and Chemical Sciences, University of Ulster, Coleraine, Co.
  • , A. RollanAffiliated withBiotechnology Research Group, School of Applied Biological and Chemical Sciences, University of Ulster, Coleraine, Co.Dept. of Biochemistry and Molecular Biology, University of Alcala, Alcala de Henares
  • , L. McHaleAffiliated withBiotechnology Research Group, School of Applied Biological and Chemical Sciences, University of Ulster, Coleraine, Co.
  • , A. P. McHaleAffiliated withBiotechnology Research Group, School of Applied Biological and Chemical Sciences, University of Ulster, Coleraine, Co.

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Summary

Non-living biomass from the thermotolerant, ethanol-producing yeast strain Kluyveromyces marxianus IMB3 is capable of uranium biosorption. The biomass has an observed biosorption capacity of 115mg uranium/g dry weight of biomass with a calculated value of 127mg uranium/g dry weight. Following exposure of the biomass to electric fields of 2,500 V/cm for 20msec. the maximum biosorption capacity (observed or calculated) for uranium did not differ significantly for the untreated biomass. However, at lower residual concentrations of uranium (<10mg/L) the capacity of the treated biomass for uranium was significantly increased above values obtained with untreated material.