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Batch mode studies were carried out for investigating the removal efficiency of sawdust carbon prepared by sulphuric acid treatment of Indian Rosewood sawdust for aqueous bivalent nickel ions. Experiments involved the study of influence of varying the parameters like pH, contact period, the initial strength of adsorbate, temperature, agitation speed and dosage of adsorbent on scavenging of adsorbate ions. Characterization of adsorbent has been done using FTIR, SEM-EDX, BET surface area and CHNSO elemental analysis. Adsorption isothermal studies are in good agreement with the Langmuir isotherm model. The highest calculated value of the correlation coefficient suggested Pseudo-second order reaction kinetics for adsorption of nickel bivalent ions on sawdust carbon. Exothermic nature and spontaneity of removal of nickel ions were shown by thermodynamic parameters. Desorption experiments were accomplished using HCl solutions of varying concentrations. High percentage adsorption of sawdust carbon adsorbent observed for Ni (II) ions indicated that it could be efficiently employed for scavenging of aqueous Ni (II) metal ions.

ADSORPTION ISOTHERM, KINETICS AND THERMODYNAMICS OF BIVALENT NICKEL SCAVENGING UTILISING SAWDUST CARBON