Corn straws and corn cobs (Zea Mays waste) have been successfully utilized as bio-sorbents for the removal of mercury (II) and cadmium (II) from aqueous solutions, respectively. The maximum removal efficiency of mercury (II) and cadmium (II) was found to be 86.9 % and 92 % respectively at optimum conditions. Effects of pH, contact time, shaking speed, initial concentration of metal ion and amount of adsorbent were studied for both the metal ions. Kinetic studies were performed to measure the time for attaining equilibrium and adsorption data were employed to different adsorption models.

Nadia Jamil ,