Optimisation of acid bioleaching of metals from pyritic ashes

E.A. Vestola (Corresponding Author), Jarno Mäkinen, T. Korhonen, Raisa Neitola, A.H. Kaksonen

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)


Solid waste from sulphuric acid production contains high concentrations of metals that are harmful if released to the environment. The purpose of this study was to evaluate the acid bioleaching of metals from a sample of pyritic ashes, consisting mainly of hematite. Bioleaching was tested in shake flasks and continuously stirred tank reactors (CSTR) inoculated with iron and sulphur oxidising acidophiles. Solubilisation of metals was mainly achieved through acid attack due to the formation of sulphuric acid by sulphur oxidising bacteria.
Original languageEnglish
Pages (from-to)520-523
JournalAdvanced Materials Research
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event20th International Biohydrometallurgy Symposium, IBS 2013 - Antofagasta, Chile
Duration: 8 Oct 201311 Oct 2013
Conference number: 20


  • bioleaching
  • pyritic ash
  • sulphur oxidation
  • waste

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