Kinetic Study of the Adsorption of Zinc and Copper Ions on to Activated Carbon Prepared from Date Pits

Document Type : Research Paper

Authors

1 University of Souk Ahras, Faculty of Sciences and Technology, Department of Process Engineering, Rue d’Annaba. BP 1553, 41000 Souk-Ahras, Algeria Laboratory of Science and Technology of Water and Environment, Mohammed Cherif

2 1 University of Souk Ahras, Faculty of Sciences and Technology, Department of Process Engineering, Rue d’Annaba. BP 1553, 41000 Souk-Ahras, Algeria 2 Laboratory of Science and Technology of Water and Environment, Mohammed Cherif

3 University of Souk-Ahras, Faculty of Sciences and Technology, Rue d’Annaba. BP 1553, 41000 Souk-Ahras, Algeria

10.22034/ijnc.2022.1.3

Abstract

In the present work, an activated carbon material has been prepared from date pits to remove zinc (Zn2+) and copper (Cu2+) from a wastewater. The effect of some parameters on adsorption performance has been investigated. The optimization of operational conditions allowed increasing the adsorption of Zn2+ ions from 33% to 85% and the adsorption of Cu2+ from 23% to 70%. The optimum conditions found are a mass of adsorbent of 4g, a stirring speed of 500 rpm and a ratio of 15 for volume of liquid / mass of solid. It has been shown that the adsorbent has more affinity to the copper ions than zinc ions and the modeling results gave adsorption isotherms type “C”. The results also showed that the kinetics of zinc and copper ions adsorption were described by a pseudo second-order rate model and controlled by the internal diffusion which can be considered as limiting step that controls the rate transfer of these ions to the solid surface.

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