Equilibrium, Kinetic and Thermodynamic Studies on Biosorption of Ni(II) and Cu(II) by using Nyctanthes arbor-tristis leaf Powder
K. Subbarayudu, R. Prathibha, C. Narasimha Rao, K. Sivakumar, P. Venkateswarlu*
DOI: 10.22607/IJACS.2017.502002
Volume 5, Issue 2 | Pages: 81-85
Abstract
The use of low-cost and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive
methods of removing metal ions from aqueous solution. The influence of various parameters on biosorption was
established to optimize Ni(II) and Cu(II) ions removal from aqueous solutions using Nyctanthes arbor-tristis leaf
powder. The pH value for maximum metal ion adsorption was determined as 6.0 and 5.0 for Ni(II) and Cu(II) ions,
respectively. The adsorption follows pseudo-second order model and rate constants were calculated. The metal ion
adsorption equilibrium was satisfactorily described by the Langmuir isotherm model than Freundlich model. The
thermodynamic parameters such as standard Gibb’s free energy (∆G°), standard enthalpy (∆H°), and standard
entropy (∆S°) changes were evaluated and concluded that this system was spontaneous and endothermic in nature.
Keywords
Nyctanthes arbor-tristis leaf powder Adsorption Nickel Copper Kinetics Thermodynamics.References
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Citation
K. Subbarayudu, R. Prathibha, C. Narasimha Rao, K. Sivakumar, P. Venkateswarlu*. Equilibrium, Kinetic and Thermodynamic Studies on Biosorption of Ni(II) and Cu(II) by using Nyctanthes arbor-tristis leaf Powder. J Appl Pharm Sci. 2017; 5(2):81-85.