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Sorption equilibrium studies of iron, copper and cobalt using activated carbon prepared from morinda pubescences linn, in aqueous medium

G.Karthikeyan, S.Siva Ilango

Morinda pubescence Linn a commonly found herbal plant was used to prepare activated carbon by physicochemical activationmethod. The sorption capacity of this bio-resource material to remove Fe(III), Cu(II) and Co(II) from aqueous solutions were determined by batch tests. The influences of important parameters such as contact time, dosage, pH, pH zpc, co-ions and temperature on metal adsorption process were also investigated. The equilibrium data were fitted to Langmuir and Freundlich isotherms. The batch adsorption rate for the sorption process was explained on the basis of intraparticle diffusion. Various thermodynamic parameters like G0, H0 and S0 were analyzed to observe the nature of adsorption. The metal adsorption process on the surface of adsorbent was verified as a surface phenomenon by performing SEM and XRD analysis.