The conductive polymer, polyaniline (PANI) and its grafting with chitosan (chitosan-grafted polyaniline, CS-g-PANI), were synthesized and analyzed by means of FTIR, TGA, TEM and XRD. The two resins were subjected for the adsorption of hexavalent chromium from aqueous solutions. The factors affecting the adsorption processes were tested, such as pH, time, temperature, and the initial concentrations...