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Research Article Open access CC BY 4.0

Equilibria of Fe(II) and Fe(III) Solvent Extraction from Nitric Acid with Bis(salicylidene)ethylenediamine

F. S. Nworie, F. I. Nwabue, W. J. O. Oti, S. P. I. Ogah, S. Eluu

International Research Journal of Pure and Applied Chemistry · pp. 1–8 · Published 11 Nov 2015

10.9734/IRJPAC/2016/20005

Abstract

The equilibria of iron (II) and iron (III) extraction with bis(salicylidene) ethylenediamine dissolved in chloroform as non polar diluents from nitric acid solutions were studied in order to develop a chemical based conditions for determining the equilibrium distribution ratios. The distribution of the extractants between the nitrate solution and the diluents was examined as well. Based on the result, it was discovered that the cation exchange extraction is mainly predominant in the low acidic region 0.01-0.0001 M, whereas in high acidic region (0.1-2 M), competitive complexation extraction is prominent. The logarithmic dependence of pH on the distribution ratio was evaluated from the linear plot with slope of 2 and 3 for Fe(II) and Fe(III) respectively. Parameters controlling the behavior of the extraction system were investigated and optimum conditions determined.  

Solvent extraction nitric acid H2Sal equilibria

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