In this work, biosorption of lead, copper and cadmium by waste brewery yeast has been studied. The adsorption capacity for lead, copper and cadmium on the biomass increased with the increasing temperature and the maximum uptakes were 0.465 mmolPb/g (96.4 mg/g), 0.769 mmolCu/g (48.9 mg/g) and 0.127 mmolCd/g (14.3 mg/g) at 308 K. The Langmuir isotherm, favorable type, and the pseudo second-order kinetic model represent our experimental data very well. The heat of biosorption was evaluated from the Langmuir isotherm equation, and the biosorption of lead, copper and cadmium was endothermic reaction.
Yang J, Volesky B, Environ. Sci. Technol., 33, 4079, 1999
Yesim S, "Selection of the Best Biosorbent for Removal and Recovery of the Heavy Metal Ions from Wastewater and Mathematical Investigation of the Adsorption in the Different Reactor Systems", Ph.D. Thesis, Hacettepe University, Ankara, Turkey, 1993