ADSORPTIVE REMOVAL OF FERROUS ION BY ACTIVATED BORASSUS FLABELLIFER BARK NANO CARBON – KINETIC AND THERMODYNAMIC STUDIES

Author(s): M.Thiruchelvi, M.M. Senthamilselvi, B.R. Venkatraman, S. Arivoli and N. Muruganantham

Abstract: The present study was on adsorption of Fe (II) ions by activated Borassus flabellifer bark nano cabon (ABNC). Using batch adsorption techniques, the influence of contact time, initial concentration, dosage of adsorbent and effect of solution pH were investigated. The equilibrium adsorption data were correlated with Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Hurkins-Jura, Halsay, Radlich-Peterson, Jovanovic and BET isotherm models. The isotherm studies of RL values showed that the adsorption process was favorable. Thermodynamic parameters such as ΔH0, ΔS0 and ΔG0 were evaluated. The data indicates that, the adsorption was spontaneous and endothermic in nature. Adsorption kinetics was tested for fitness with pseudo- second-order, Elovich model and Intra- particle diffusion models. Kinetic studies indicate an adsorption followed the pseudo-second-order reaction. The study shows that intra-particles diffusion played a vital role in the adsorption of Fe (II) ions. The ABNC has high adsorption capacity and adsorption rate for the removal of Fe (II) ions from aqueous solution.

PAGES: 434-444  |  28 VIEWS  33 DOWNLOADS