Kinetics of Experimental Adsorption of Nickel Metal by Activated Carbon
D. Elbar1,2, H. Rahaly2, A. Guiedeui2
1Center for Scientific and Technical Research for Arid Regions Omar El-Bernaoui Biskra, Biskra, 07000 Algeria
2University of Biskra, Biskra, 07000 Algeria
Keywords: Nickel sulfide, activated carbon, citric acid, kinetic adsorption, Langmuir model, Freundlich model
Abstract
The objective of this study is the recuperation of metal nickel by adsorption with activated carbon prepared from natural waste (the peel of the apricot kernel), where adsorption is controlled by a chemical phenomenon driven by a series of factors. The adsorption efficiency was evaluated after carbonization of the raw material at 600 ° C and after its activation with citric acid at 500 ° C. The characterization of the material after physicochemical treatment has shown the possibility of its improvement. The IR spectroscopy technique has shown the material becomes very rich in carbon and oxygen, and is well functionalized. The activated carbon can adsorb nickel efficiently, and then inverted conditions ensure efficient elution. Kinetic adsorption is dependent on the activated carbon, while equilibrium loading is not but is dependent on plant conditions. The kinetic study of the optimal adsorption of nickel ions follows the models of Langmuir and Freundlich, and exhibits a high affinity between the metal nickel examined and the carbon active, which enables the highest adsorption.
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