Biosorption of cadmium from aqueous solution by baker’s yeast (Saccharomyces cerevisiae)

S. C. Moreno-Rivas, R. I. Armenta-Corral, M. C. Frasquillo-Félix, I. Lagarda-Díaz, L. Vázquez-Moreno, G. Ramos-Clamont Montfort

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6 Scopus citations

Abstract

Biosorption of cadmium (Cd) by Baker´s yeast was studied using zeta potential (ζ), Atomic Absorption Spectroscopy, Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy, microbial growth, electrophoresis and immunodetection (SDS-PAGE-westernblot). Cell surface hydrophobicity was of 22.8±2.9%, zeta potential values were negative and pH-dependent (-27±0.7mV, pH 5.0; -33±0.9mV; pH 6.0). Yeast-Cd interaction occurred in the first 5 min of incubation with aζ decrease up to 11 units. Cadmium removal efficiency (CIC) was dependent of water pH and Cd initial concentration (IC). CIC was higher (p < 0.05) at pH 6.0 and IC [5 mg/L]. Under these conditions Cd removal was of 3.8±0.01 mg/L. (76%). Changes observed in FT-IR spectra involved carboxyl, amide and phosphate groups with yeast-Cd interaction. The SEM micrograph of yeast cells exposed to Cd showed variation on morphology, surface rugosity and loss of cell contact without changes in cell size (3.3±0.6 µm). Adaptation of Saccharomyces cerevisiae for growth in Cd was observed. Yeast lag phase increased 1.6-2.0 times with Cd exposition, which correlates with the expression of heat shock protein HSP104. These findings indicate that S. cerevisiae has potential for Cd remediation of contaminated places.

Translated title of the contributionBiosorción de cadmio en solución acuosa utilizando levadura de panadería (Saccharomyces,cerevisiae)
Original languageEnglish
Pages (from-to)843-857
Number of pages15
JournalRevista Mexicana de Ingeniera Quimica
Volume15
Issue number3
StatePublished - 2016

Bibliographical note

Publisher Copyright:
© 2016, Universidad Autonoma Metropolitana Iztapalapa. All rights reserved.

Keywords

  • Bioremediation
  • Cadmium
  • S. cerevisiae

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