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Thermodynamics and Adsorption Isotherms of Copper Ions Removal from Solutions Using Synthetic Zeolite X

S. Svilović orcid id orcid.org/0000-0003-0300-8932 ; Department of Chemical Engineering Faculty of Chemistry and Technology, University of Split, Teslina 10/V, 21000 Split, Croatia
D. Rušić ; Department of Chemical Engineering Faculty of Chemistry and Technology, University of Split, Teslina 10/V, 21000 Split, Croatia
R. Žanetić ; Department of Chemical Engineering Faculty of Chemistry and Technology, University of Split, Teslina 10/V, 21000 Split, Croatia


Puni tekst: engleski pdf 201 Kb

str. 299-305

preuzimanja: 834

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Sažetak

The sorptive removal of copper ions from aqueous solutions using zeolite X has been studied by a batch technique. The impact of solute concentration and temperature on the process of sorption were examined. Using obtained experimental values thermodynamic parameters such as: G0, H0 and S0 were calculated.
Langmuir, Freundlich, Dubinin-Radushkevich and Sips isotherms were fitted to experimental data, and their goodness-of-fit were compared.
The isotherms that take into account some sort of heterogeneity were found to give a better fit to experimental data than Langmuir. An apparent free energy, calculated using Dubinin-Radushkevich isotherm, showed ion-exchange type of spontaneous and endothermic sorption.
The results indicated that synthetic zeolite X can be used as an efficient ion-exchange material for the removal of copper ions from wastewaters.

Ključne riječi

zeolite X; copper; isotherms; thermodynamics

Hrčak ID:

26761

URI

https://hrcak.srce.hr/26761

Datum izdavanja:

25.9.2008.

Posjeta: 1.386 *