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Abstract— <p>The process of bioleaching of metallurgical slag containing nickel and copper was studied at 40, 45, and 50°C. The microbial communities grown at 40 and 45°C that included <i>Leptospirillum ferriphilum</i> and <i>Sulfobacillus thermosulfidooxidans</i> bacteria were used in the experiments. The microbial community, which was cultivated at 50°C, included the representatives of <i>S. thermosulfidooxidans</i> and <i>Acidiplasma</i> sp. It was demonstrated that dissolution of the solid phase, oxidation of ferrous iron by microorganisms were the largest at 45°C. At the same time, the majority of copper (95.5–100%) and nickel (92.3–100%) passed into the solution at the first day of bioleaching. The study of the kinetics of chemical leaching of non-ferrous metals over 4 h demonstrated that in the presence of 5 g/L Fe<sup>3+</sup>, the extraction of nickel and copper was 93.0 and 94.3%, respectively, while in the absence of Fe<sup>3+</sup>, 75.0% of nickel and 77.8% of copper passed into the solution.</p>

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Bioleaching of Nickel-Containing Metallurgical Slag by Chemolithotrophic Microorganisms at Different Temperatures

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • N. V. Fomchenko,
  • G. V. Novikov,
  • V. S. Melamud,
  • M. I. Muravyov

摘要

Abstract—

The process of bioleaching of metallurgical slag containing nickel and copper was studied at 40, 45, and 50°C. The microbial communities grown at 40 and 45°C that included Leptospirillum ferriphilum and Sulfobacillus thermosulfidooxidans bacteria were used in the experiments. The microbial community, which was cultivated at 50°C, included the representatives of S. thermosulfidooxidans and Acidiplasma sp. It was demonstrated that dissolution of the solid phase, oxidation of ferrous iron by microorganisms were the largest at 45°C. At the same time, the majority of copper (95.5–100%) and nickel (92.3–100%) passed into the solution at the first day of bioleaching. The study of the kinetics of chemical leaching of non-ferrous metals over 4 h demonstrated that in the presence of 5 g/L Fe3+, the extraction of nickel and copper was 93.0 and 94.3%, respectively, while in the absence of Fe3+, 75.0% of nickel and 77.8% of copper passed into the solution.