Biosorption of heavy metal ion (Zn2+) by immobilized Saccharomyces cerevisiae cells was studied. The biosorbent that we studied was made from fresh Bakers' yeast commercially available under beads form. We used three different initial concentrations of Zn2+ in solution, 129.60 mg Zn2+/L, 213.41 mg Zn2+/L and 304.88 mg Zn2+/L, for biosorption study in dynamic regime, at 25°C and neutral pH. Adsorption yields, η, and retention capacity, Qs, were

This work presents experimental results obtained in the process of Cd2+ removal from model solutions using batch (magnetic stirring) and fixed bed procedures. As adsorbent we used a mixture consisting of bentonite and baker's yeast (2, 4, 6 and 8 g in 1:0, 3:1, 1:1, 1:3 and 0:1 ratios), immobilized in calcium alginate. Adsorption capacities were calculated, and breakthrough curves were plotted in order to describe the influence of various working