Optimisation of acid bioleaching of metals from pyritic ashes

Elina A. Vestola (Corresponding Author), Jarno Mäkinen, Tero Korhonen, Raisa Neitola, Anna H. Kaksonen

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (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 typeA1 Journal article-refereed
    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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