Silver Uptake and Reuse of Biomass by Saccharomyces cerevisiae and Chlorella emersonii
Studies were carried out on the recovery of bound silver and reuse of Chlorella emersonii and Saccharomyces cerevisiae biomass for further silver uptake after they were placed in contact with 20mg/l silver for 30 minutes to allow for maximum binding. It was found that 0.16M nitric acid gave the best recovery rates of silver. We conclude that, although both organisms were amenable to reuse in further binding of silver, Chlorella emersonii was more efficient than Saccharomyces cerevisiae. Both organisms lost efficiency in metal uptake after two cycles of silver uptake and reuse of biomass. Metals may be more amenable to recovery and purification following biosorption than through chemical removal which has been reported elsewhere.
Keywords: Biogeotechnology, Silver uptake, Reuse of biomass, Saccharomyces cerevisiae, Chlorella emersonii
Bio-Research Vol. 6 (1) 2008: pp. 317-319