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Biometallurgy for Manganese and Copper Ores

  • L. Toro
  • C. Abbruzzese
  • F. Vegliò
  • B. Paponetti

Abstract

The paper discusses the biotreatment of Italian ores of potential commercial interest, using oxidizing and reducing microorganisms in mixed and pure cultures. The study focused on copper and manganese ores.

Bioleaching tests were carried out in Erlenmeyer flasks, a L.K.B. modified microfermenter and a newly designed reactor. In particular the development during the time of the chalcopyrite bioleaching of catalyzed by Thiobacillus ferrooxidans is proposed. The main biochemical and chemical reactions concerned in the production of soluble and insoluble species were investigated during the culture growth particularly the time when the principal reactions begin and their duration.

Experimental runs were also performed using urea in place of ammonium sulphate.

Manganese bioleaching was carried out utilizing various microrganisms coming from the natural habitat; interesting results as regards rates and yields were obtained by mixed cultures. Tests of some strains isolated from these cultures were carried out.

Keywords

Pilot Plant Manganese Dioxide Manganese Nodule Thiobacillus Ferrooxidans Copper Solubilization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Elsevier Science Publishing Co., Inc. 1990

Authors and Affiliations

  • L. Toro
    • 1
  • C. Abbruzzese
    • 2
  • F. Vegliò
    • 1
  • B. Paponetti
    • 1
  1. 1.Dipartimento di ChimicaIngegneria chimica e Materiali, University of L’AquilaMonteluco di RoioItaly
  2. 2.Istituto per il Trattamento dei Minerali (CNR)RomeItaly

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