Adsorption of Cd(II) ions by synthesize chitosan from fish shells

One of the major applications of chitosan and its many derivatives is based on its ability to bind strongly heavy and toxic metal ions. Chitosan is made from chitin by a chemical process involving demineralization(DM),deproteinization (DP), decolorization (DC), and deacetylation (DA). In this research natural bio polymer “chitosan ” was synthesized using fish shells and adsorption of cadmium by chitosan was studied. Chitosan was characterized using Fourier Transform Infrared Spectroscopy (FTIR) and solubility in 1 % acetic acid. The affinity of chitosan for cadmium was studied using CdCl2 solution as the heavy metal solution containing Cd (II) ions. The Infra red spectroscopic study on the chitosan and the metal-chitosan complexes reveal a metal coordination based on the observed characteristic band changes. At initial cadmium concentrations of 3, 5, 8 mg/L, the adsorbed cadmium ion concentrations are 2.5, 4.2 and 7.4 mg/L, respectively