THE EFFECT OF ELECTRIC-FIELD STIMULATION ON THE BIOSORPTION OF URANIUM BY NONLIVING BIOMASS DERIVED FROM KLUYVEROMYCES-MARXIANUS IMB3

Non-living biomass from the thermotolerant, ethanol-producing yeast st rain Kluyveromyces marxianus IMB3 is capable of uranium biosorption. T he biomass has an observed biosorption capacity of 115mg uranium/g dry weight of biomass with a calculated value of 127mg uranium/g dry weig ht. 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. H owever, at lower residual concentrations of uranium ( <10mg/L) the cap acity of the treated biomass for uranium was significantly increased a bove values obtained with untreated material.