Kinetic and Thermodynamic Studies for the Removal of Nickel Ions from an Aqueous Solution by Adsorption Technique

The kinetics and dynamics of nickel ions adsorption on activated carbon and bentonite were studied. The influence of parameters (pH, amount of adsorbent, adsorbate concentration, solution volume, rotation speed, and temperature) were investigated. Kinetic models of pseudo-first, pseudo-second and We...

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Bibliographic Details
Published in:Journal of dispersion science and technology 2014-01, Vol.35 (1), p.130-142
Main Authors: El-Mallah, Nabila M., Hassouba, Hind M.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
adsorption isotherms
Aqueous solutions
bentonite
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
kinetics models
nickel ions
Surface physical chemistry
thermodynamics parameters
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Summary:The kinetics and dynamics of nickel ions adsorption on activated carbon and bentonite were studied. The influence of parameters (pH, amount of adsorbent, adsorbate concentration, solution volume, rotation speed, and temperature) were investigated. Kinetic models of pseudo-first, pseudo-second and Weber-Morris models were applied. The data was better reported by the pseudo-second order model. Freundlich, Langmuir, and D-R models were utilized for the analysis of adsorption equilibrium. Evaluation of thermodynamic parameters reveal that adsorption is spontaneous and endothermic in nature. From the experimental data, it was concluded that bentonite has more efficiency for the adsorption of nickel ions than activated carbon.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691.2013.769173