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

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.

Zinc-Containing Effluent Treatment Using Shewanella xiamenensis Biofilm Formed on Zeolite

“…Data obtained experimentally were fitted to four kinetic models: pseudo-first-order model (PFO), pseudo-second-order model (PSO), Elovich model (EM), and Weber and Morris intraparticle diffusion model (IPM). The description of the models can be found in References [ 13 , 19 ].…”

“…Experimental data were fitted with the Langmuir, Freundlich, and Temkin isotherm models, presented in References [ 13 , 19 ].…”

“…Copper in model solutions was determined in accordance with the procedure presented in our previous studies [ 18 , 19 ]. Metal concentrations in the effluent were determined using ICP-MS systems (the Element 2™, the Thermo Scientific, Chemnitz, Germany) [ 20 ].…”

Sorption of Heavy Metal Ions of Chromium, Manganese, Selenium, Nickel, Cobalt, Iron from Aqueous Acidic Solutions in Batch and Dynamic Conditions on Natural and Synthetic Aluminosilicate Sorbents

“…In practice, adsorption techniques have found the greatest use due to the low cost and high efficiency in removing impurities of various origins such as dyes, detergents, and desiccants, whereas their acidity makes them attractive catalysts. So far, the usefulness of such sorption materials as polymer resins, natural zeolites, clays, bio-adsorbents, activated carbon, organic, and inorganic mesoporous silica has been described [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Metal Removal from Complex Copper Containing Effluents by Waste Biomass of Saccharomyces cerevisiae

“…Biological techniques are usually considered as an alternative to traditional techniques and can significantly reduce the quantity of heavy metals in aqueous solutions [5]. Among biological techniques, biosorption technique is the most common and cost-effective, since biosorbents are available in abundance, renewable, non-toxic, cheap, main part of them can be regenerated and reused [6]. Application of biosorbents for wastewater treatment requires less investment in terms of both initial cost and operational cost in comparison with conventional techniques, simple design, easy operation and no effect of toxic substances [3].…”