In this research work natural bio polymer “chitosan” was synthesized using locally available fish shells and
adsorption of copper by chitosan was studied. Synthesize of chitosan involved four main stages as preconditioning,
demineralization, deprotenisation and deacetylation. Chitosan was characterized using Fourier Transform Infrared
Spectroscopy (FTIR). The affinity of chitosan for cupper was studied using anhydrous CuCl2 solution as the heavy
metal solution containing Cu (II) ions. Adsorption of cupper ions by chitosan was investigated under different
conditions. Amount of copper absorbed was evaluated using atomic adsorption spectroscopy.