Journal of Chemical Engineering and Its Applications

Authors: Kavitha. G, Prof. Dr. N. Chitti Babu

Abstract: 

The present research work deals with the equilibrium, kinetics and thermodynamic study for the biosorption of lead ions from aqueous solutions using Morinda tinctoria leaf powder. The biosorption process is carried in batch process by varying six parameters: agitation time, biosorbent size and dosage, pH of the aqueous solution, initial metal concentration and temperature. The percentage biosorption increases with an increase in initial concentration of lead. The statistical analysis of biosorption using Response Surface methodology (RSM) was studied. The quadratic model for Central Composite Design (CCD) has fitted well to the experimental data. The experimental data are well described by Freundlich, Langmuir and Redlich isotherm models.  The biosorption data follows pseudo second order kinetics. The biosorption is endothermic, irreversible and feasible.