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<p>As the demand for nuclear energy grows, developing efficient and eco-friendly uranium extraction technologies for complex low-grade ores has increasingly important. This comparative study shows that bioleaching outperforms sodium chlorate-based chemical leaching in column leaching of low-grade carbonaceous-siliceous-argillaceous uranium ore. Under identical experimental conditions (58&#xa0;kg of − 30&#xa0;mm ore, 72-day leaching duration), bioleaching achieved a higher uranium leaching rate (67.71% vs. 59.15%) and lower acid consumption (0.35% vs. 0.58%). Leaching kinetics of both systems are controlled by product layer diffusion. These results demonstrate the efficiency and economic viability of bioleaching, offering guidance for the sustainable processing of such uranium ores.</p>

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Bioleaching versus chemical leaching of low-grade carbonaceous-siliceous-argillaceous uranium ore in column reactors

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Xuegang Wang,
  • Shuo Sun,
  • Xuefan Wang,
  • Jian Wang,
  • Zhongkui Zhou,
  • Zhanxue Sun

摘要

As the demand for nuclear energy grows, developing efficient and eco-friendly uranium extraction technologies for complex low-grade ores has increasingly important. This comparative study shows that bioleaching outperforms sodium chlorate-based chemical leaching in column leaching of low-grade carbonaceous-siliceous-argillaceous uranium ore. Under identical experimental conditions (58 kg of − 30 mm ore, 72-day leaching duration), bioleaching achieved a higher uranium leaching rate (67.71% vs. 59.15%) and lower acid consumption (0.35% vs. 0.58%). Leaching kinetics of both systems are controlled by product layer diffusion. These results demonstrate the efficiency and economic viability of bioleaching, offering guidance for the sustainable processing of such uranium ores.