Comparison of the oxidation kinetics of different pyrites in the presence of Thiobacillus ferrooxidans or Leptospirillum ferrooxidans

M. Boon*, H. J. Brasser, G. S. Hansford, Joseph J. Heijnen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

52 Citations (Scopus)

Abstract

Bioleaching studies were carried out to determine the effect of both the chemical reactivity of the pyrite as well as the affinity of a bacterial strain to the ferrous to ferrite iron ratio, on the overall bacterial oxidation rate of a pyrite. Pure culture of Thiobacillus ferrooxidants and an enrichment culture of Leptospirillum bacteria on a framboidal pyrite from Germany and a euhedral pyrite from Prieska, South Africa were used. The results are discussed in terms of the relative affinities of T. ferrooxidants and the Leptospirillum bacteria for the ferrous/ferric-ion ratio, and susceptibility of the two types of pyrite to ferric leaching.

Original languageEnglish
Pages (from-to)57-72
Number of pages16
JournalHydrometallurgy
Volume53
Issue number1
DOIs
Publication statusPublished - 1999
Externally publishedYes

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