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Removal of lead from solution using non-living residual brewery yeast

Riordan, C and McHale, Anthony (1998) Removal of lead from solution using non-living residual brewery yeast. BIOPROCESS ENGINEERING, 19 (4). pp. 277-280. [Journal article]

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A number of preparations of residual non-living brewery yeast were examined for their ability to remove lead from solution. Those preparations included washed and un-washed intact yeast and washed and un-washed homogenates of the yeast cells. Using biosorption isotherm analysis it was found that the washed and un-washed preparations of intact, non-living yeast exhibited maximum biosorption capacities for lead of 127 and 99 mg/g dry weight biomass, respectively. The washed and unwashed cell homogenates exhibited maximum biosorption capacities of 38 and 139 mg lead/g dry weight biomass, respectively. Since it had previously been shown that these preparations of biomass were capable of removing uranium from solution by combined biosorption and precipitation processes, it was decided to examine removal of lead from solution using a form of equilibrium dialysis in which the biomass was retained within a semi-permeable membrane during contact reactions. The results suggest that precipitation plays an important role during removal of lead from solution, and this is partially due to membrane-permeable substances released from the biomass into the membrane-excluded solution. The results demonstrate that removal of lead from solution by some of the yeast preparations used in this study involves combined biosorption and precipitation.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences > School of Pharmacy and Pharmaceutical Science
Faculty of Life and Health Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Pharmacy & Pharmaceutical Sciences
ID Code:3994
Deposited By: Professor Anthony McHale
Deposited On:18 Dec 2009 11:28
Last Modified:04 Dec 2012 11:40

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