Removal and adsorption kinetics of copper(II) ions from aqueous media on activated carbon in dynamic adsorption on a fixed-bed column

Removal and adsorption kinetics of copper(II) ions from aqueous media on activated carbon in dynamic adsorption on a fixed-bed column

Dynamic adsorption experiments on fixed-bed columns and adsorption kinetics studies of Cu2+ in aqueous media, under various experimental conditions, were carried out on activated carbon (AC) prepared using coconut shells from Franceville (Gabon). Results of dynamic adsorption experiments showed that...

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Bibliographic Details
Main Authors: Mve Mfoumou, Charly, Tonda-Mikiéla, Pradel, Ngoye, Francis, Bouassa Mougnala, Spenseur, Mbouiti, Berthy Lionel, Feuya Tchouya, Guy Raymond
Format: Article
Language:English
Published: Académie des sciences 2024-06-01
Series:Comptes Rendus. Chimie
Subjects:
Cu<sup>2+</sup>
Removal
Activated carbon
Coconut shells
Dynamic adsorption
Adsorption kinetics
Online Access:https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.285/
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Summary:Dynamic adsorption experiments on fixed-bed columns and adsorption kinetics studies of Cu2+ in aqueous media, under various experimental conditions, were carried out on activated carbon (AC) prepared using coconut shells from Franceville (Gabon). Results of dynamic adsorption experiments showed that particle size (x) of the column bed, flow rate (D) and bed height (h) influence adsorption capacities at saturation (Qsat) and removal percentages (E) of Cu2+ on the prepared AC. The best Qsat and E (52.52 mg/g and 55.02%, respectively) were obtained with 0.01 < x < 0.04 mm, D = 2 mL/min, and h = 3 cm, with Cu2+ concentration and pH constant at 250 mg/L and 6.5, respectively. The adsorption kinetic studies indicated that the Thomas model and pseudo-first-order kinetic model best describe the adsorption mechanisms of Cu2+ in our experimental conditions. On the other hand, in addition to reversible interactions (physisorption), it appeared that irreversible reactions (chemisorption) also took place on the surface of the adsorbent. Results obtained from the intraparticle kinetics model study indicated that intraparticle diffusion is not the limiting step in Cu2+ adsorption and that surface adsorption plays a predominant role.
ISSN:1878-1543

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