Biosorption of Cd2+ and Cu2+ on immobilized Saccharomyces cerevisiae
Autor: | Xiulan Zhao, Fengyu Zan, Shou-Liang Huo, Beidou Xi |
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Rok vydání: | 2011 |
Předmět: |
inorganic chemicals
Chromatography biology Chemistry Metal ions in aqueous solution Saccharomyces cerevisiae Biosorption Langmuir adsorption model Sorption Heavy metals biology.organism_classification symbols.namesake Adsorption kinetics Desorption symbols General Environmental Science Nuclear chemistry |
Zdroj: | Frontiers of Environmental Science & Engineering. 6:51-58 |
ISSN: | 2095-221X 2095-2201 |
DOI: | 10.1007/s11783-011-0206-9 |
Popis: | The biosorption of Cd2+ and Cu2+ onto the immobilized Saccharomyces cerevisiae (S. cerevisiae) was investigated in this study. Adsorption kinetics, isotherms and the effect of pH were studied. The results indicated that the biosorption of Cd2+ and Cu2+ on the immobilized S. cerevisiae was fast at initial stage and then became slow. The maximum biosorption of heavy metal ions on immobilized S. cerevisiae were observed at pH 4 for Cd2+ and Cu2+. by the pseudo-second-order model described the sorption kinetic data well according to the high correlation coefficient (R 2) obtained. The biosorption isotherm was fitted well by the Langmuir model, indicating possible mono-layer biosorption of Cd2+ and Cu2+ on the immobilized S. cerevisiae. Moreover, the immobilized S. cerevisiae after the sorption of Cd2+ and Cu2+ could be regenerated and reused. |
Databáze: | OpenAIRE |
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