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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.2017.502001
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Research Article
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Adsorption of Lead and Zinc on
Curcuma longa Leaf Powder from Aqueous Solutions |
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K. Subbarayudu, R.
Prathibha, C. Narasimha Rao, K. Sivakumar, P. Venkateswarlu* |
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ABSTRACT |
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In this paper, adsorption of lead and
zinc on Curcuma longa leaf powder from solutions with
environmentally relevant concentrations of metals was studied. The
kinetics of adsorption of metal ions was analyzed. Optimum pH values
for maximum metal ion adsorption were determined. Adsorption
isotherms were expressed by Langmuir and Freundlich models. Langmuir
adsorption model fits the experimental data reasonably well than
Freundlich model. The thermodynamic parameters - such as standard
Gibb’s free energy change (ΔG°), standard enthalpy change (ΔH°), and
standard entropy change (ΔS°) - were evaluated, which indicated that
this system was spontaneous and endothermic. The studies showed that
this low-cost material could be used as an efficient adsorbent for
the removal of lead and zinc from aqueous solutions. |
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Key words: Curcuma longa leaf
powder, Adsorption, Lead, Zinc, Kinetics, Thermodynamics. |
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[Download Full Article
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KROS Publications |
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