Critical evaluation of CuSO4-H2O system up to solubility limit, from eutectic point to 373.15 K
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2022-08-10
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Mcode
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Language
en
Pages
18
Series
Chemical Engineering Science, Volume 257
Abstract
The solubility of copper(II) sulfate in water as a function of temperature and ionic strength is successfully modelled using Pitzer formalism. Four types of experimental data from the literature were implemented for the assessment, namely activity and osmotic coefficients, freezing point depression and solubility of CuSO4 in water. This work proved that four Pitzer parameters with eight terms are sufficient to create a consistent thermodynamic model of the CuSO4-H2O system up to 5 mol/kg-H2O of CuSO4, from the eutectic point to 373.15 K. The whole optimization study included a critical deviation analysis to sort out less reliable experimental data. To verify the results of this work, comparisons were carried out with experimental data which were not included in the assessment, i.e. the vapour pressure of the saturated solution, thermodynamic values of the cell reaction as well as electrochemical cell potential (EMF).Description
Funding Information: This research is funded by the Foundation for Research of Natural Resources in Finland (Detailed aqueous solution chemistry for flotation circuits in Nordic conditions, Decision 20210033) and the Steel and Metal Producers' fund (Improvement of thermodynamic predictions for copper-smelter and converter slag chemistry, Decision 1497).
Keywords
Activity coefficient, Pitzer model, Reaction, Solubility, Vapour pressure, Water activity
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Citation
Sibarani, D, Sippola, H, Taskinen, P & Lindberg, D 2022, ' Critical evaluation of CuSO 4 -H 2 O system up to solubility limit, from eutectic point to 373.15 K ', Chemical Engineering Science, vol. 257, 117689 . https://doi.org/10.1016/j.ces.2022.117689