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Química Nova

versión impresa ISSN 0100-4042

Resumen

SOUSA JUNIOR, Clenilson da Silva et al. Thermodynamic modeling for solvent extraction of metals divalent in sulphate media using D2EHPA. Quím. Nova [online]. 2012, vol.35, n.2, pp. 301-307. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422012000200013.

The extraction of divalent metals (Mn2+, Ni2+, Co2+ and Cu2+) in the system MSO4 - H2SO4 - H2O - D2EHPA in isoparaffin (17/21) was studied by a thermodynamic model based on chemical equilibria with mass and charge balance equations. The activity coefficients of all solutes in the aqueous phase were calculated by Davies equation. By applying this model, the equilibrium concentrations of solutes were calculated from de concentration of divalent metals and pH. The predicted distribution coefficients for the divalents metals were in good agreement with experimental results.

Palabras llave : modeling; solvent extraction; divalent metals.

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