N-(2-Carboxybenzyl) grafted chitosan as adsorptive agent for simultaneous removal of positively and negatively charged toxic metal ions

► N-(2-carboxybenzyl) grafted chitosan as ion adsorbent. ► Application of a mechanistic model for adsorption kinetics. ► Characterization with FTIR, SEM, BET analysis. ► Isotherms, kinetics, desorption and reuse are studied. ► L-F model for equilibrium adsorption data.