Effects of Several Inhibitors to Thiobacillus ferrooxidans on Ferrous Promoted Chalcopyrite Leaching.

DOI Web Site 2 Citations 11 References

Bibliographic Information

Other Title
  • Effect of Serveral Inhibitors to Thiobacillus ferrooxidans on Ferrous Promoted Chalcopyrite Leaching

Search this article

Abstract

Ferrous ions enhance copper extraction from chalcopyrite in sulfuric acid solutions in air at ambient temperatures, because they promote chalcopyrite oxidation with dissolved oxygen. However iron-oxidizing bacteria such as Thiobacillus ferrooxidans rapidly consume ferrous ions, suppressing copper extraction. In this paper, three compounds were used to inhibit ferrous oxidation by T. ferrooxidans and their effects on ferrous promoted chalcopyrite leaching were investigated in the presence and absence of the bacteria. Sodium lauryl sulfate and tannic acid suppressed not only the bacterial ferrous oxidation but also the chalcopyrite oxidation with dissolved oxygen, resulting in a suppression of copper extraction. High concentrations of sulfuric acid (> 0.05 mol dm-3) suppressed the bacterial ferrous oxidation and promoted chalcopyrite oxidation with dissolved oxygen, causing enhanced copper extraction.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 115 (3), 172-176, 1999

    The Mining and Materials Processing Institute of Japan

Citations (2)*help

See more

References(11)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top