Heike Bostelmann, Gordon Southam
Bioleaching models to examine copper extraction from low-grade chalcopyrite ores were set up to identify the influence of pyrite on leaching efficacy. A combination of scanning electron microscopy and geochemical analysis showed that extraction was marginally enhanced by the addition of pyrite when using a combination of Leptospirillum ferrooxidans, an iron oxidiser, Acidithiobacillus thiooxidans, a sulphur oxidising species and Acidithiobacillus ferrooxidans, an iron and sulphur oxidiser. Extensive biofilms formed on the pyrite surfaces (>10^6 cells/mm^2) but were severely limited on chalcopyrite, possessing approximately the same number of cells as quartz grains, an internal non-nutrient control “substrate” (with ca. 2 × 10^3 cells/mm^2). The presence of dissolved copper did not inhibit the growth of this consortium. Indirect “bioleaching” of chalcopyrite appears to be limited by proton activity at the chalcopyrite surface.
@article{3506a3ac-8894-4a9c-8b60-2d83aacd62e7,
title={A Column Leaching Model of Low Grade Cha},
author={Heike Bostelmann and Gordon Southam},
year={2026},
language={en}
}TY - JOUR TI - A Column Leaching Model of Low Grade Cha AU - Heike Bostelmann AU - Gordon Southam PY - 2026 LA - en ER -
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