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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 10, No. 1, 2007, pp. 1-14
Bioline Code: ej07009
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 10, No. 1, 2007, pp. 1-14

 en Lead biosorption onto waste beer yeast by-product, a means to decontaminate effluent generated from battery manufacturing industry
Parvathi, Krishnakumar; Nagendran, Ramachandramurthy & Nareshkumar, Radhakrishnan


This paper projects the potential of waste beer yeast Saccharomyces cerevisiae in biosorbing lead from battery manufacturing industrial effluent. Experiments were carried out as a function of pH, biosorbent concentration, lead concentration and agitation speed. Specific lead uptake of 2.34 mg/g was recorded and the data gave good fits for Freundlich and Langmuir models with Kf and Qmax values of 0.5149 and 55.71 mg/g. The roles played by amines, carboxylic acids, phosphates, sulfhydryl group and lipids in lead biosorption were studied. Electrostatic attraction may be the mechanism of biosorption. The extent of contribution of the functional groups and lipids to lead biosorption was in the order: carboxylic acids > lipids > amines > phosphates. Blocking of sulfhydryl group did not have any significant effect on lead uptake.

biosorption, electrostatic attraction, Freundlich, Langmuir, functional group, lead, yeast.

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