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Removal of divalent heavy metal mixtures from water by Saccharomyces Cerevisiae using crossflow microfiltration

Lookup NU author(s): Dr Bulent Keskinler, Dr Avni Cakici, Professor Galip Akay

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Abstract

The removal of heavy metal ions, Ni2+, Cu2+ and Pb2+ using yeast (Saccharomyces cerevisiae) as carriers in a crossflow microfiltration is investigated. The effects of yeast cell and electrolyte concentrations on the transient and steady-state permeate flux and metal ion rejections are established. It is found that the metal ion rejection reaches a plateau if yeast cell concentration is greater than ∼2g/l as a result of cell aggregation. The binding affinity of the metals to yeast cell is Pb2+ > Cu2+ > Ni2+, which is also reflected in the metal ion rejection under identical process conditions. Because of the formation of yeast cell flocks in the presence of Pb2+, permeate flux is also higher for this metal. The presence of NaCl decreases both rejection and permeate flux for Ni2+ and Cu2+ but not for Pb2+. When binary or ternary metal mixtures are used, the rejection of the individual metals is reduced except that of Pb2+. It is found that the pseudo-gel concentration is unaffected by the presence of metal ions. Copyright © 2001 Elsevier Science Ltd.

Publication metadata

Author(s): Akay G; Cakici A; Keskinler B; Bayhan YK; Levent M

Publication type: Article

Publication status: Published

Journal: Water Research

Year: 2001

Volume: 35

Issue: 9

Pages: 2191-2200

ISSN (print): 0043-1354

ISSN (electronic): 1879-2448

Publisher: IWA Publishing

URL: http://dx.doi.org/10.1016/S0043-1354(00)00499-1

DOI: 10.1016/S0043-1354(00)00499-1

PubMed id: 11358298

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