Biosorption of Cu(II) Ions from Aqueous Solution on Saccharomyces Cerevisiae Biomass: Isotherm and Kinetics Modelling

In this study, Saccharomyces cerevisiae biomass was used as biosorbent for the retention of Cu(II) ions from aqueous solution. The biosorption experiments were performed in batch systems in optimal conditions (pH = 5.0; 4 g yeast/L, room temperature) as a function of initial Cu(II) ions concentration and contact time. Langmuir and Freundlich isotherm models were used to analyze the experimental isotherms, while pseudo-first order and pseudo-second order models were used for the kinetics modeling. Based on the isotherm and kinetics parameters calculated from the experimental results, the biosorption mechanism of Cu(II) ions on Saccharomyces cerevisiae yeast was proposed, and some possible applications of this biosorption process were highlighted.