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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1046

Title: Biosorption of monovalent and divalent ions on baker's yeast
Authors: Vasudevan, Padma
Padmavathy, V
Dhingra, S C
Keywords: Biosorption
Metal ions
Mechanism
Wastewater treatment
Yeast
Issue Date: 2002
Citation: Bioresource Technology, 82(3), 285-289
Abstract: Biosorption of monovalent ions Na+ and K+, by deactivated protonated yeast (Saccharomyces cerevisiae) at controlled pH, was compared with biosorption of divalent ions Ca2+ and Mg2+ to help to understand the underlying binding mechanisms. The adsorption for monovalent ions was accompanied by H+ release. Divalent ions were sorbed by proton displacement, and also an additional mode not accompanied by release of H+. The sorption uptake of both monovalent and divalent metal ions increased with pH in the range 3–7 peaking at 6.75. Equilibrium sorption isotherms at pH=6.75 showed that the total maximum biosorptive capacity for metal ions decreased in the following order: Ca>Mg>NaK.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1046
Appears in Collections:Chemical Engineering

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