The Kinetics of Biosorption and Desorption to Pb2+ on Beer Yeast

The kinetics of biosorption and desorption to lead ions on dried and wet wasted beer yeast were investigated with the instruments of AAS and SEM. In order to enhance the experimental results reliability and practice application value, the sorption solution system was gone on “L”-degree dosage level in the whole experimental process. The results showed that the biosorption and desorption process were fast to Pb²⁺ on dried and wet beer yeast. There were very good biosorption or desorption effect in the first 30 min, and in this time, the desorption efficiency was 91.70% and 82.93% to dried and wet beer yeast, respectively. In the first biosorption process, wet beer yeast had better biosorption effect than dried beer yeast. In addition, desorbent of 0.1 mol/L HNO₃ was considered that it couldn´t use as the best desorption condition. The other desorption conditions were need research or the beer wasted beer yeast is only used for single-time biosorbent.