Theoretical confirmation of an established experimental phase diagram of ternary system (Cu(SO4)–Zn(SO4)–H2O) at 25°C: Pitzer parameters determination

The isotherm phase diagram of the ternary system (Cu(SO4)–Zn(SO4)–H2O) was firstly established at 25°C using a synthetic method of conductivity measurement. Then, we made use of volumetric dosing, in order to identify solid phases. The obtained isotherm has revealed the presence of two solid phases...

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Bibliographic Details
Published in:Journal of materials research and technology 2019-05, Vol.8 (3), p.2741-2746
Main Authors: Mekkaoui, Bouchra, Jouaiti, Mohamed, Barroug, Abderrahim, Jouaiti, Ahmed, Laallam, Latifa
Format: Article
Language:English
Subjects:
Copper sulfate
Gibbs energy
Isotherm
Pitzer
Zinc sulfate
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Summary:The isotherm phase diagram of the ternary system (Cu(SO4)–Zn(SO4)–H2O) was firstly established at 25°C using a synthetic method of conductivity measurement. Then, we made use of volumetric dosing, in order to identify solid phases. The obtained isotherm has revealed the presence of two solid phases that having a stable equilibrium with the liquid phase, which are Cu(SO4)·5H2O, and the Zn(SO4)·7H2O. This study was confirmed numerically while going through the calculation of the binary and ternary Pitzer parameters for the studied salts through a Nelder Mead simplex algorithm. Indeed, the comparison of these with the bibliographic data has confirmed the accuracy of our experimental results.
ISSN:2238-7854
DOI:10.1016/j.jmrt.2019.04.010