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

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

2 Citations (Scopus)

Abstract

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
EditorsSabrina Hedrich, Kathrin Rübberdt, Franz Glombitza, Wolfgang Sand, Axel Schippers, Mario Vera Véliz, Sabine Willscher
Pages24-27
Number of pages4
DOIs
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication

Publication series

SeriesSolid State Phenomena
Volume262
ISSN1012-0394

Keywords

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

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  • Cite this

    Mäkinen, J., Salo, M., Hassinen, H., & Kinnunen, P. (2017). Comparison of reductive and oxidative bioleaching of jarosite for valuable metals recovery. In S. Hedrich, K. Rübberdt, F. Glombitza, W. Sand, A. Schippers, M. V. Véliz, & S. Willscher (Eds.), 22nd International Biohydrometallurgy Symposium (pp. 24-27). Solid State Phenomena, Vol.. 262 https://doi.org/10.4028/www.scientific.net/SSP.262.24