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Efficient Removal of Metals from Synthetic and Real Galvanic Zinc–Containing Effluents by Brewer’s Yeast Saccharomyces cerevisiae

Authors
  • Zinicovscaia, Inga1, 2, 3
  • Yushin, Nikita1
  • Abdusamadzoda, Daler1
  • Grozdov, Dmitrii1
  • Shvetsova, Margarita1
  • 1 (M.S.)
  • 2 &D in Physics and Nuclear Engineering, 30 Reactorului, MG-6 Bucharest-Magurele, Romania
  • 3 Laboratory of Quantum Chemistry, Catalysis and Physical Methods, The Institute of Chemistry, Academiei Street 3, 2028 Chisinau, Moldova
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Aug 16, 2020
Volume
13
Issue
16
Identifiers
DOI: 10.3390/ma13163624
PMID: 32824380
PMCID: PMC7475842
Source
PubMed Central
Keywords
License
Green

Abstract

The performance of the brewer’s yeast Saccharomyces cerevisiae to remove metal ions from four batch systems, namely Zn(II), Zn(II)-Sr(II)-Cu(II), Zn(II)-Ni(II)-Cu(II), and Zn(II)-Sr(II)-Cu(II)-Ba(II), and one real effluent was evaluated. Yeast biosorption capacity under different pH, temperature, initial zinc concentration, and contact time was investigated. The optimal pH for removal of metal ions present in the analyzed solution (Zn, Cu, Ni, Sr, and Ba) varied from 3.0 to 6.0. The biosorption process for zinc ions in all systems obeys Langmuir adsorption isotherm, and, in some cases, the Freundlich model was applicable as well. The kinetics of metal ions biosorption was described by pseudo-first-order, pseudo-second-order, and Elovich models. Thermodynamic calculations showed that metal biosorption was a spontaneous process. The two-stage sequential scheme of zinc ions removal from real effluent by the addition of different dosages of new sorbent allowed us to achieve a high efficiency of Zn(II) ions removal from the effluent. FTIR revealed that OH, C=C, C=O, C–H, C–N, and NH groups were the main biosorption sites for metal ions.

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