The research about the adsorption of Pb2+ and Ni2+ ions used chitin and chitosan from prawn shells have been done. Characterisation of chitin and chitosan was determined by measuring the water content, ash content, and identification of fiinctional group. Adsorption of Pb2+ and Ni2+ with chitin and chitosan was determined through the measure of equilibrium time, optimum concentration, and adsor…