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Studies on bio-chemical thermodynamics of lead biosorption from aqueous system using corn husk biomass as biosorbant agent

Author: 
Diptendu Sarkar, Goutam Paul and Ramachandra Murthy, T. T. S.
Subject Area: 
Life Sciences
Abstract: 

In our study, biosorption characteristics of Pb (II) ions from aqueous solution using corn husks biomass were investigated using batch techniques process. The effects of pH, contact time, initial metal ion concentration, and temperature were also studied. The FTIR study showed that the several functional groups such as O-H, C=O, C-O, C-H and N-H were more involved in binding Pb (II) ions to the biomass. The equilibrium datawere analyzed by the Langmuir, the Freundlich and the Temkinisotherms equations model. It was found that adsorption of Pb (II) ions onto corn husks, was best described by Freundlich adsorption model. Our biosorption kinetics data were fitted using pseudo-first-order and pseudo-second-order models, and it was found that the kinetics data fitted into the pseudo-second order model more perfectly. Thermodynamic parameters such as standard Gibbs free energy (ΔG0), standard enthalpy (ΔH0) and standard entropy (ΔS0) were also evaluated simultaneously. The obtained result showed that biosorption of lead (II) ions bycorn husk was spontaneous, endothermic in nature and it can be used as a potent bioremediation agent.

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