Scholarlink

<p>This study isolated and cultured two bacterial strains, <i>Acidithiobacillus ferrooxidans</i> and <i>Acidithiobacillus thiooxidans</i>, from copper mine drainage water. The researchers investigated the potential of these isolated strains to bioleach total rare earth elements (REE) and, separately, scandium from the fly ash of Azey brown coal combustion. Experiments demonstrated that <i>Acidithiobacillus ferrooxidans</i> cultures achieved higher extraction efficiencies for these metals than <i>Acidithiobacillus thiooxidans</i>. The study confirmed that this bacterial strain can adapt to extract essential nutrients, specifically an energy substrate and phosphorus, directly from the fly ash. This eliminates the need to add these nutrients to the culture medium externally. An optimal fly ash concentration in the liquid medium was determined using a&#xa0;multi-passage cultivation technique. These optimized conditions enabled high bioleaching efficiencies of 95.47% for scandium and 92.6% for total rare earth elements by mass.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of a bioleaching process for scandium and total rare earth elements from brown coal fly ash

  • 期刊论文

  • 发表日期：

    2026年2月1日

查看全文
  • T. M. Sabirova,
  • V. A. Snegirev

摘要

This study isolated and cultured two bacterial strains, Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans, from copper mine drainage water. The researchers investigated the potential of these isolated strains to bioleach total rare earth elements (REE) and, separately, scandium from the fly ash of Azey brown coal combustion. Experiments demonstrated that Acidithiobacillus ferrooxidans cultures achieved higher extraction efficiencies for these metals than Acidithiobacillus thiooxidans. The study confirmed that this bacterial strain can adapt to extract essential nutrients, specifically an energy substrate and phosphorus, directly from the fly ash. This eliminates the need to add these nutrients to the culture medium externally. An optimal fly ash concentration in the liquid medium was determined using a multi-passage cultivation technique. These optimized conditions enabled high bioleaching efficiencies of 95.47% for scandium and 92.6% for total rare earth elements by mass.