Thermodynamic Model for Acidic Metal Sulfate from Solubility Data

Petri Kobylin*, Hannu Sippola, Pekka Taskinen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review


Acidic metal sulfate solutions are generated in a large scale in the hydro-and pyrometallurgical industries. Acid mine drainage has long been a significant environmental problem in coal and metal mining. Acidic metal sulfate solutions are also produced in steel industry. The demand of recycling and reuse of materials has increased significantly especially in EU. Dumping a neutralized deposit is not an option any more. Thus, several techniques of recycling and reuse of sulfuric acid and/or metal sulfates from the side streams are needed. When developing alternative solutions a better understanding of the thermodynamic behavior of MnSO4-H2SO4-H2O system is needed. In this study a thermodynamic model of this system is developed using Gibbs energy minimisation, Pitzer model and CALPHAD method to yield thermodynamically consistent set of values for solubility of metal sulfate in a wide temperature and concentration range.

Original languageEnglish
Title of host publicationREWAS 2013 Enabling Materials Resource Sustainability
PublisherJohn Wiley & Sons
Number of pages10
ISBN (Electronic)9781118679401
ISBN (Print)9781118605875
Publication statusPublished - 25 Feb 2013
MoE publication typeA3 Part of a book or another research book


  • Acid mine drainage
  • Pitzer model
  • Thermodynamic modeling


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