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Article Dans Une Revue Separation and Purification Technology Année : 2008

Kinetics of Nickel(II) extraction by 2-ethylhexanal oxime in ammonium nitrate solution

Résumé

Kinetics of nickel(II) extraction by 2-ethylhexanal oxime (EHO) has been investigated in a homothetic cell (Rushton cell) from ammonium solutions. The kinetic study was carried out with a stirring speed fast enough to eliminate the diffusion limitation. The chemical regime can then be assumed and the kinetic result can be used to determine the reaction mechanism. Thus, a kinetic mechanism has been suggested and a limiting step found. Influence of pH and the concentrations of NH4NO3 and EHO on rate have been investigated and results suggest that the limiting step is an interfacial reaction between a molecule of EHO monomer (HOx) and the adsorbed complex Ni(Ox)(H2O)5ad+.

Domaines

Génie chimique

Dates et versions

hal-00796583 , version 1 (04-03-2013)

Identifiants

Citer

Arnaud Buch, Moncef Stambouli, Dominique Pareau. Kinetics of Nickel(II) extraction by 2-ethylhexanal oxime in ammonium nitrate solution. Separation and Purification Technology, 2008, 60 (2), pp.120-127. ⟨10.1016/j.seppur.2008.01.023⟩. ⟨hal-00796583⟩
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