Kinetics of nickel(II) extraction by 2-ETHYLHEXANAL (cas 123-05-7) oxime in ammonium nitrate solutions
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Add time:09/05/2019 Source:sciencedirect.com
Kinetics of nickel(II) extraction by 2-ETHYLHEXANAL (cas 123-05-7) 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+.
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