Adsorption of γ-picoline onto acid-activated bentonite from aqueous solution

The adsorption of γ-picoline onto acid-activated bentonite was investigated. The adsorption reached a maximum at pH = 7. Pseudo-first-order, pseudo-second-order, the Elovich equation, and intraparticle diffusion models were used to analyze the kinetic data obtained at different concentrations. The p...

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Bibliographic Details
Published in:Applied clay science 2010-02, Vol.47 (3), p.421-427
Main Authors: Rawajfih, Zahir, Nsour, Najwa
Format: Article
Language:English
Subjects:
Acid-activated bentonite
Adsorption
Aqueous solutions
Bentonite
Correlation
Diffusion
Earth sciences
Earth, ocean, space
Endothermic reactions
Exact sciences and technology
Isosteric heat
Mathematical analysis
Mathematical models
Mineralogy
Silicates
γ-picoline
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Summary:The adsorption of γ-picoline onto acid-activated bentonite was investigated. The adsorption reached a maximum at pH = 7. Pseudo-first-order, pseudo-second-order, the Elovich equation, and intraparticle diffusion models were used to analyze the kinetic data obtained at different concentrations. The pseudo-second-order model was best applicable to describe the adsorption of γ-picoline on acid-activated bentonite. The Langmuir model provided good correlation with the experimental data. The adsorption of γ-picoline was endothermic with ∆ H° = 29 J/mol.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2009.12.012