Assessment of Mercury biosorption by Saccharomyces cerevisiae: Response surface methodology for optimization of low Hg (II) concentrations. Issue 4 (August 2018)

• Record Type: Journal Article
• Authors: Hadiani, Mohammad Rasoul; Khosravi-Darani, Kianoush; Rahimifard, Nahid; Younesi, Habibollah
• Is Part Of: Journal of environmental chemical engineering. Volume 6:Issue 4(2018)
• Page Start: 4980
• Page End: 4987
• Publication Date: 2018-08
• Subjects: Bioremediation -- Heavy metal -- Mercury -- Yeast; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2018.07.034
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Bioremediation of Hg (II) in from Foodstuff and Water: Application of Saccharomyces cerevisiae . Highlights: Saccharomyces cerevisiae can be applied to removal of very low concentration (ppb) of Hg (II) ions from aqueous solutions. Three significant variables are defined including: biomass dose, solution pH, and initial Hg (II) ion concentration. Hg removal may be as high as 89% at optimum conditions. Abstract: The potential of Saccharomyces cerevisiae for bioremoval of low concentrations of Hg 2+ ions at ppb level in aqueous solutions was investigated. The effects of biomass, initial pH-value and initial Hg concentration on the removal efficiency of yeast were studied, and these parameters were optimized by central composite design. Verification of Hg 2+ removal data was accomplished based on analytical quality assurance before instrumental analysis. Obtained data revealed that the optimal conditions for Hg biosorption were: 5.45, 79.8 μg/L and 47.7 × 10 7 CFU for pH-value, initial Hg 2+ concentration and biomass, respectively; the maximum Hg 2+ removal efficiency under optimal conditions was found to be 88.9%. These findings suggest that, in addition to its known ability to remove high levels of heavy metals in wastewater, S. cerevisiae can even be used for mitigation of very low concentrations of precarious elements such as mercury, usually considered as pollutants in water treatment and food processing industry.