Journal
INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY
Volume 6, Issue 2, Pages 119-130Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s40090-015-0038-8
Keywords
Biosorption; Kinetics; Heavy metals; Yeast; Pretreatment
Categories
Ask authors/readers for more resources
The present work evaluates the performance of the yeast Saccharomyces Cerevisiae to remove heavy metals from aqueous solutions. The effect of pH, temperature, initial concentration, contact time, and biosorbent dosage on biosorption capacity is studied. Experiment results show that metal uptake is a rapid process at pH values (5.0-6.0), and the order of accumulated metal ions is Pb > Zn > Cr > Co > Cd > Cu. The biosorption process obeys Freundlich and the Langmuir adsorption isotherms. The kinetics of metal ions biosorption could be described by Lagergren and Ho models. Nitric acid with low concentration of 0.05 N is effective in desorbing the biosorbed metal ions. Sodium hydroxide solution of 0.2 M is effective in regenerating the yeast; the regenerated yeast could be used for at least six cycles of biosorption, without losing its metal removal capacity. Carboxyl, amine, and phosphate groups present in the yeast were found to be the main biosorption sites for metal ions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available