Factors affecting silver biosorption by an industrial strain of Saccharomyces cerevisiae

Singleton, Ian; Simmons, Paul

Abstract

Factors affecting silver biosorption by Saccharomyces cerevisiae biomass, obtained as a waste product from industry, were examined. Maximum removal of silver from solution was achieved within 5 min. Increasing the concentration of biomass in experimental flasks from 1 to 8 mg cm−3 decreased both silver accumulation, from 224·7 to 89·5 μmol Ag g−1 dry wt, and associated H+ ion release, from 109·4 to 31·7 μmol H+ g−1 dry wt. The presence of 1·0 mol dm−3 cadmium or methionine decreased silver biosorption by 40% and 93% respectively. Boiling in 100 mmol dm−3 NaOH or 10 mmol dm−3 sodium dodecyl sulphate decreased silver biosorption by 54% and 25% respectively. A temperature increase from 4°C to 55°C decreased silver biosorption by 9%. The metabolic state of the yeast had no effect on silver biosorption. Decreasing the pH of the silver solution caused a reduction in metal removal by the biomass.

Citation

Singleton, I., & Simmons, P. (1996). Factors affecting silver biosorption by an industrial strain of Saccharomyces cerevisiae. Journal of Chemical Technology and Biotechnology, 65(1), 21-28. https://doi.org/10.1002/%28SICI%291097-4660%28199601%2965%3A13.0.CO%3B2-E

• Journal Article Type: Article
• Acceptance Date: Jul 31, 1995
• Publication Date: 1996-01
• Deposit Date: Aug 3, 2016
• Journal: Journal of Chemical Technology & Biotechnology
• Print ISSN: 0268-2575
• Electronic ISSN: 1097-4660
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 65
• Issue: 1
• Pages: 21-28
• DOI: https://doi.org/10.1002/%28SICI%291097-4660%28199601%2965%3A13.0.CO%3B2-E
• Keywords: silver; biosorption; Saccharomyces cerevisiae
• Public URL: http://researchrepository.napier.ac.uk/Output/325051