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Indian Journal of Advances in Chemical Science Volume: 5,
Issue: 3, July 2017 |
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ISSN No.: 2320-0898 (Print);
2320-0928 (Electronic)
DOI:
10.22607/IJACS.2017.503002
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Research Article
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Branch Wastes of Grape Bushes
as a Low-cost Adsorbent for Copper Ions Removal from Water Solutions
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Oktay Akperov*,
Elchin Akperov, Rasmiya Mamedova, Humaya Gadimova |
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ABSTRACT |
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The branch wastes of grape bushes as
adsorbent for copper (II) ions removal from water solutions was
investigated. The equilibrium sorption data were fitted to Langmuir,
Freundlich, Dubinin-Radushkevich (D-R) and Temkin isotherms. The
coefficient of determination value of Langmuir equation was the
highest (0.9994). The maximum monolayer sorption capacity is 3.47
mmol g−1. The mean of free energy was determined to be
3.26 kJ mol−1. The calculated value of heat of adsorption
has been obtained 0.627 J mol−1. The kinetic data are
better described by the pseudo-second model. The calculated values
of the maximum sorption capacity from the pseudo-second order
equation (3.16 mmol g−1) and from the D-R isotherm (3.145
mmol g−1) are well agreements with its experimentally
found value (3.264 mmol g−1). The negative value of ΔH°
(–46.767 kJ mol−1) indicates exothermic nature of the
adsorption process and the negative value of ΔS° (–0.15 kJ mol−1K−1)
indicates a decreased disorder during adsorption process.
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Key words: Adsorption,
Branch wastes of grape bushes, Copper ions, Adsorption isotherms,
Kinetics, Thermodynamic parameters. |
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[Download Full Article
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