Chromium (VI) biosorption by Saccharomyces cerevisiae subjected to chemical and thermal treatments

• Published in: Environmental science and pollution research international Vol. 25; no. 19; pp. 19179 - 19186
• Main Authors: De Rossi, Andrea, Rigon, Magali Rejane, Zaparoli, Munise, Braido, Rafael Dalmas, Colla, Luciane Maria, Dotto, Guilherme Luiz, Piccin, Jeferson Steffanello
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2018; Springer Nature B.V
• Subjects: Adsorption; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Baking yeast; Biomass; Biosorption; Chemical treatment; Chromium; Chromium - chemistry; Earth and Environmental Science; Ecotoxicology; Effluents; Environment; Environmental Chemistry; Environmental Health; Environmental science; Fermentation; Heat treatment; Industrial effluents; Industrial wastewater; Isotherms; Kinetics; Mathematical models; Microorganisms; Multilayers; Saccharomyces cerevisiae; Saccharomyces cerevisiae - chemistry; Short Research and Discussion Article; Waste Water Technology; Water Management; Water Pollutants, Chemical - chemistry; Water Pollution Control; Yeast; Yeasts; Isotherm; Biosorption; Cr(VI); Yeast; Chemical treatment
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-018-2377-4

The potential of chemically and thermally treated Saccharomyces cerevisiae as biosorbents for chromium (VI) was investigated in this work. The presence of this toxic metal in industrial effluents is harmful to the environment, so, it is important to develop environmental friendly methods for Cr(VI) removal from these effluents. Biosorption using microorganisms such as S. cerevisiae is a viable treatment option because this biomass is easily available as a residue of fermentation industries. In this study, the affecting variables on Cr(VI) biosorption were studied by constructing biosorption isotherms, using lyophilized yeast subjected to chemical and thermal treatments. S . cerevisiae was able to remove 99.66% of Cr(VI) from effluents by biosorption. The significant variables affecting biosorption were pH, initial Cr(VI) concentration, and contact time. The biosorption isotherms were represented by the Freundlich model for the untreated biomass, BET model for the chemically treated biomass, and Langmuir model for the heat-treated biomass. Thermal treatment increased the biosorption affinity of the biomass for chromium, while the chemical treatment facilitated the formation of a multilayer.