Hongchang Liu, Jinlan Xia
The bioleaching of pure chalcopyrite by thermophilic Archaea strain Acidianus manzaensis YN-25 under different constant pH was first comparatively investigated. Then the relevant sulfur speciation was analyzed by synchrotron radiation based X-ray diffraction (SR-XRD) and K-edge X-ray absorption near edge structure (XANES) spectroscopy. The acidity of the leaching solution was monitored at 3-h intervals to make it steady at pH 1.25, 1.50, 1.75, 2.00, 2.25 and 2.50, respectively. Leaching results showed that the copper ion extraction increased during chemical leaching but decreased during bioleaching when pH value decreased from 2.50 to 1.25. SR-XRD analysis showed that, during bioleaching, jarosite gradually became a major phase when pH value increased. XANES analysis further showed that covellite was detected during bioleaching at cases of pH 1.25 to 2.00 at lower redox potential (ORP) value, while chalcopyrite and bornite were detected at cases of pH 2.25 and 2.50 at lower ORP.
@article{94e0cbf1-ecdf-4874-a874-72c91b91d1bb,
title={Bioleaching of chalcopyrite by Acidianus},
author={Hongchang Liu and Jinlan Xia},
year={2026},
language={en}
}TY - JOUR TI - Bioleaching of chalcopyrite by Acidianus AU - Hongchang Liu AU - Jinlan Xia PY - 2026 LA - en ER -
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