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            <title xml:lang="en">Heavy metals removal by adsorption onto peanut husks carbon: characterization, kinetic study and modeling</title>
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                <title xml:lang="en">Heavy metals removal by adsorption onto peanut husks carbon: characterization, kinetic study and modeling</title>
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                    <surname>Ricordel</surname>
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                <term xml:lang="en">Modeling</term>
                <term xml:lang="en">Characterization</term>
                <term xml:lang="en">Peanut husks</term>
                <term xml:lang="en">Kinetic adsorption</term>
                <term xml:lang="en">Heavy metals</term>
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              <p>Carbon prepared from peanut husks (PHC) has been used for the adsorption of Pb2+, Zn2+, Ni2+ and Cd2+, over a range of initial metal ion concentration (0.15 mM). Chemical and physical characteristics of PHC were determined. The effects of particle size and of carbon doses were evaluated by batch experiments. The kinetics of sorption were followed, based on the amounts of metal sorbed at various time intervals. The modeling of kinetic and isotherm curves has also been investigated. The rate constant and the reaction order have been calculated. The results show that Pb2+ has best affinity to PHC than Cd2+, Ni2+, Zn2+. From these results an order of the sorption capacity of metal ions sorbed was derived.</p>
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              <p>Le charbon préparé à partir de coques d'arachide (PHC) a été utilisé pour l'adsorption de Pb2+, Zn2+, Ni2+ et Cd2+, sur une plage de concentrations initiales en ions métalliques (0,15 mM). Les caractéristiques chimiques et physiques du PHC ont été déterminées. Les effets de la taille des particules et des doses de carbone ont été évalués par des expériences par lots. La cinétique de sorption a été suivie, en fonction des quantités de métal sorbées à différents intervalles de temps. La modélisation des courbes cinétiques et isothermes a également été étudiée. La constante de vitesse et l'ordre de réaction ont été calculés. Les résultats montrent que le Pb2+ a une meilleure affinité pour le PHC que le Cd2+, le Ni2+ et le Zn2+. À partir de ces résultats, un ordre de capacité de sorption des ions métalliques sorbés a été déduit.</p>
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