Comparison of reductive and oxidative bioleaching of jarosite for valuable metals recovery

Jarno Mäkinen (Corresponding author), Marja Salo, Hanna Hassinen, Päivi Kinnunen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

8 Citations (Scopus)


Jarosite is a typical stream of zinc refineries, with high production rates and possible release of metal-contaminated seepage waters during long-term storage in respective disposal sites. Jarosite contains remarkable concentrations of valuable metals, like several weight percentages of zinc and lead, in addition to lower concentrations of copper, silver, germanium, gallium and indium. In this study, jarosite was treated with reductive and oxidative bioleaching for valuable metals recovery. The reductive bioleaching was seen to enhance iron liberation, by transforming the dissolved Fe(III) to Fe(II), while in the oxidative bioleaching iron liberation was lower. Zinc, copper, indium, gallium and germanium dissolution rates were rather identical with both methods. In reactor experiments, the zinc and copper yields were higher than in flask experiments resulting at best in the leaching yield of 35% and 38% for zinc and copper, respectively. Indium and gallium yields were between 5-8%, but approximately 40% of germanium was leached.
Original languageEnglish
Title of host publication22nd International Biohydrometallurgy Symposium
Subtitle of host publicationSelected, peer reviewed papers from the Proceedings of the 22nd International Biohydrometallurgy Symposium
EditorsSabrina Hedrich, Kathrin Rübberdt, Franz Glombitza, Wolfgang Sand, Axel Schippers, Mario Vera Véliz, Sabine Willscher
PublisherTrans Tech Publications
ISBN (Print)978-3-0357-1180-6
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication

Publication series

SeriesSolid State Phenomena


  • bioleaching
  • contamination
  • gallium
  • germanium
  • indium
  • leaching
  • metal recovery
  • metal refineries
  • metals
  • river pollution
  • seepage
  • zinc


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