Adsorption of copper (II) ions on montmorillonite and sepiolite clays: equilibrium and kinetic studies

The removal of Cu(II) with montmorillonite and sepiolite clays in aqueous solutions has been studied. The optimum conditions for adsorption using a batch method were evaluated by changing various parameters such as contact time, adsorbent amount, initial pH of the solution and initial metal concentr...

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Bibliographic Details
Published in:Desalination and water treatment 2012-07, Vol.45 (1-3), p.351-360
Main Authors: CORUH, Semra, GEYIKCI, Feza
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Applied sciences
Aqueous solutions
Clay
Clays
Copper
Data processing
Exact sciences and technology
Heavy metals
Isotherm
Isotherms
Kinetics
Mathematical models
Metal concentrations
Montmorillonite
Montmorillonites
pH effects
Pollution
Removal
Sepiolite
Solutions
Sorption
Water treatment and pollution
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Summary:The removal of Cu(II) with montmorillonite and sepiolite clays in aqueous solutions has been studied. The optimum conditions for adsorption using a batch method were evaluated by changing various parameters such as contact time, adsorbent amount, initial pH of the solution and initial metal concentration. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Temkin adsorption isotherm models. By comparing the Akaike’s Information Criterion (AIC) and the sum of error squared (SSE) of these models in the three kinetic systems. The Freundlich isotherm best describe the adsorption of Cu(II) on montmorillonite and sepiolite. The adsorption kinetic data were modeled using the Lagergren-fi rst order, pseudo-second order, and Elovich. Adsorption data of the Cu(II) were fi tted well by the Elovich model. The results indicate that montmorillonite and sepiolite are good adsorbents for Cu(II) in aqueous solutions.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.1080/19443994.2012.692058