H. Ciftci, A. Akcil
The first laboratory tests on biooxidation and cyanidation of gold ores in Turkey were carried out using samples of the Copler Gold Mine. Over a 3 year R&D test period, mixed bacterial/archaeal cultures improved biooxidation of the Copler ore. The highest sulphide oxidation of 87.35% over 432 h was achieved in shake flasks in the presence of the mixed culture (MODM: Sulfolobus acidophilus and Sulfolobus thermosulfidooxidans). Bioreactor tests resulted in greater dissolution rates for iron and arsenic than did shake-flask tests, which led to a greater extent of sulphide oxidation within a shorter period of time. The maximum sulphide oxidation in the bioreactor tests was 97.79% after 240 h when the EXTM (Acidimicrobium and Sulfolobus metallicus) mixed culture was used. After the biooxidation experiments with solids contents of 10% and 20% (w/v), the gold recovery from the oxidised ore was lower than that achieved in the presence of 5% solids (w/v) because the extent of sulphide oxidation was reduced as the pulp density increased. A strong correlation between the sulphide oxidation and gold recovery was also established. The highest gold recovery of 94.48% was achieved during cyanidation from the bio-oxidised ore produced from the experiment conducted using the EXTM mixed culture.
@article{da6c969b-4b6f-4f71-8bbd-7945cdcbe84d,
title={Biohydrometallurgy in Turkish gold minin},
author={H. Ciftci and A. Akcil},
year={2026},
language={en}
}TY - JOUR TI - Biohydrometallurgy in Turkish gold minin AU - H. Ciftci AU - A. Akcil PY - 2026 LA - en ER -
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