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

Autori
Svilović, Sandra ; Rušić, Davor ; Žanetić, Ratimir

Izvornik
Chemical and Biochemical Engineering Quarterly (0352-9568) 22 (2008), 3; 299-305

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
zeolite X; copper; isotherms; thermodynamics

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.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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