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Bioleaching of Sulfide Ores by a Pure Culture of Acidithiobacillus Thiooxidans
(German Mongolian Institute for Resouce and Technology, 2022-05-16) Anand Oyunbat; Ariuntuya; T. Hollenberg; Munkhzaya
Throughout the world, the reserves of metal ore deposits are dwindling, research into the extraction of metals from low grade deposits are becoming increasingly important. Low concentrations of Cu, Fe were analyzed in the Oyu Tolgoi Southwest deposit’s Phase 4B ore, which is unsuitable to be extracted through flotation method. Bacterial cells have been shown to be capable of converting metals form solid to liquid phase in the bioleaching process. Particle size, pH, and pulp density are the most significant characteristics in bioleaching; thus, we focused our research on improving the solid-liquid phase ratio. The microorganisms Acidithiobacillus thiooxidans, both acidophilic and mesophilic, were used in this study. AAS analysis was used to determine the metal recovery in the leachate, while the residual metal concentrations in the insoluble form were determined through calculations. The solid-liquid phase ratios of 1:2, 1:4, 1:6 was investigated. The maximum Cu (0.5%) was observed at solid liquid phase ratio of 1:6, according to atomic absorption spectrometry (AAS) data.