Abstract

This study was aimed at investigating the sorption of Ni(II) ions on anode dust which is an industrial waste material of aluminium production. The effects of various parameters such as the initial pH, contact time, temperature and initial concentration were studied. The thermodynamic parameters were determined. The positive values of enthalpy change ΔH suggested the endothermic nature of the sorption process. The sorption kinetic data could be described well using a pseudo‐second‐order model and the equilibrium data could be fitted well to the Langmuir and Freundlich isotherm. It can be concluded that the obtained sorption capacity for Ni(II) ions is a good indicator of the anode dust potential for use in an aqueous sorption system.Cette étude avait pour but l’investigation de la sorption des ions de Ni(II) sur la poussière d’anode, un matériau de rejet industriel de la production de l’aluminium. On a étudié l’effet de divers paramètres comme le pH initial, la durée de contact, la température, et la concentration initiale. On a déterminé les paramètres thermodynamiques. Les valeurs positives du changement d’enthalpie ΔH suggéraient la nature endothermique du procédé de sorption. On pourrait bien décrire les données cinétiques de la sorption en utilisant un modèle de pseudo deuxième ordre et l’on pourrait bien ajuster les données d’équilibre à l’isotherme de Langmuir et Freundlich. On peut conclure que la capacité de sorption obtenue pour les ions de Ni(II) est un bon indicateur du potentiel de la poussière d’anode pour utilisation dans un système aqueux de sorption.

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