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1588547 
Journal Article 
Thermodynamic model for acidic Fe(II) sulphate from solubility data 
Kobylin, PM; Sippola, H; Taskinen, PA 
2012 
Yes 
CALPHAD
ISSN: 0364-5916 
38 
185-193 
WOS:000309309800023 
Acidic ferrous sulphate solutions are generated in a large scale in the hydro- and pyrometallurgical industries. They are also produced in the steel industry and titanium dioxide production. Acid mine drainage has long been a significant environmental problem in the coal and metal sulphide mining. The demand of recycling and reuse of materials has increased significantly especially in EU. Dumping and land filling a neutralised deposit is not an option anymore. Thus, efficient techniques of recycling and reuse of sulphuric acid and/or metal sulphates from the side streams are needed. When developing alternative solutions, a better understanding of the thermodynamic behaviour of the FeSO4-H2SO4-H2O system is needed. In the present study a thermodynamic model of this system has been developed, in order to yield a thermodynamically consistent set of values for the solubility of iron sulphate in a wide temperature and concentration range. The current model presents the experimental data available with a good accuracy and consistently up to 100 degrees C, and sulphuric acid concentrations up to 10 mol/kg. The model also predicts well the solubility measurements available in dilute sulphuric acid solutions at 160-220 degrees C. (C) 2012 Elsevier Ltd. All rights reserved. 
Ferrous sulphate; Solubility; Ferrous sulphate hydrates; Pitzer model; Sulphuric acid; CALPHAD method