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Comparisons of Ionic Equilibria Analysis of ZnSO4-Fe2(SO4)3-Na2SO4-H2SO4-NaOH-H2O system at 25℃ etween Pitzer and Vasil`e Equation
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2003, v.16 no.2, pp.159-165
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(2003). Comparisons of Ionic Equilibria Analysis of ZnSO4-Fe2(SO4)3-Na2SO4-H2SO4-NaOH-H2O system at 25℃ etween Pitzer and Vasil`e Equation. Analytical Science and Technology, 16(2), 159-165.
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Abstract
To develop an ionic equilibria model applicable to the sulfuric acid leaching solutions of zinc oxide ore, the method of the Pitzer equation and that of the Vasil'ev equation were compared. As the ionic strength of the solution increased to 9 m, the results of ionic equilibria by the Pitzer equation were more accurate than those by Vasil'ev. To simulate the sulfuric acid leaching solutions of zinc oxide ore, the mixed solutions with the various composition of <TEX>$ZnSO_4-Fe_2(SO_4)_3-Na_2SO_4-H_2SO_4-NaOH-H_2O$</TEX> were prepared. The pH values calculated in this study agreed well with those measured at <TEX>$25^{\circ}C$</TEX>.
- keywords
- zinc oxide, <TEX>$H_2SO_4$</TEX>, leaching, Pitzer, Vasil'ev, pH
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