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Indian Journal of Advances in Chemical Science Volume: 5,
Issue: 2, April 2017 |
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ISSN No.: 2320-0898 (Print);
2320-0928 (Electronic)
DOI:
10.22607/IJACS.2017.502002
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Research Article
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Equilibrium, Kinetic and
Thermodynamic Studies on Biosorption of Ni(II) and Cu(II)
by using Nyctanthes arbor-tristis leaf Powder |
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K. Subbarayudu, R.
Prathibha, C. Narasimha Rao, K. Sivakumar, P. Venkateswarlu* |
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ABSTRACT |
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The use of low-cost and ecofriendly
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 nickel(II) and copper(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 (∆Go),
standard enthalpy (∆Ho) and standard entropy (∆So)
changes were evaluated and concluded that this system was
spontaneous and endothermic in nature. |
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Key words: Nyctanthes
arbor-tristis leaf powder, adsorption, nickel, copper, kinetics,
thermodynamics |
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[Download Full Article
PDF] |
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