Thermodynamic modeling for solvent extraction of metals divalent in sulphate media using D2EHPA

Quimica nova

Nascimento, Marisa¹  Nascimento, Karina Rodrigues Paiva Ranauro do¹  Ximenes, Dalton de Sousa²  Sousa Junior, Clenilson da Silva²  Cunha, Osvaldo Galvão Caldas da³ 

[1] Centro de Tecnologia Mineral, Rio de Janeiro, Brasil;Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro, Brasil;Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

关键词: modeling;    solvent extraction;    divalent metals.;   

DOI  :  10.1590/S0100-40422012000200013

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The extractionof 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 onchemical equilibria with mass and charge balance equations. The activity coefficientsof all solutes in the aqueous phase were calculated by Davies equation. By applyingthis model, the equilibrium concentrations of solutes were calculated from deconcentration of divalent metals and pH. The predicted distribution coefficientsfor the divalents metals were in good agreement with experimental results.

【 授权许可】

CC BY