Immobilization of isolated bacteria from east of Kurdistan province in calcium alginate for biosorption of nickel

Looking at the role of microorganisms in various industrial and biotechnological processes and considering the advantages of using immobilized microorganisms the importance of immobilization is determined. Preventing the free migration of microorganisms during the processes, easy recycling, and reusability, increasing the efficiency of microorganisms in the processes, and enhancing the stability of cells are some of the advantages of cell immobilization. The purpose of this research is to study the nickel absorption on stabilized bacteria in calcium alginate. In this study, bacterial cells were immobilized on calcium alginates. Among immobilization methods, Entrapment and drop methods were applied. The effects of pH, contact time, and concentration of metal ions on nickel absorption were investigated and the desired contact time and optimum pH were obtained. Considering that the active groups have a major role in the absorption of toxic metals, organisms containing these groups can be used. The results of this study showed that the optimum pH was 6 the time of equilibrium was about 150 minutes the maximum absorption rate of the metal by the stabilized bacterium was about 0.45 mM g-1. The bacterium studied was from bacterial Micrococcus

Keywords:

Immobilization , Calcium alginate , Nickel , Biosorption , Kurdistan