Scholarlink

<p>Rising atmospheric carbon dioxide is projected to exceed 800 ppm by 2100, yet its impact on acid mine drainage (AMD), which is currently contaminating 480,000 km of rivers, remains unclear. Here we combine a global meta-analysis of 82 AMD-associated sites covering diverse climate zones and ore types with laboratory experiments across environmentally relevant carbon dioxide gradients. We find that atmospheric carbon dioxide is the dominant global predictor of the key acid-forming genus <i>Acidithiobacillus</i>. Elevated carbon dioxide enhances microbial carbon fixation and electron transport, accelerates ferrous iron oxidation, intensifies acidification, and subsequently increases cadmium and zinc mobilization by 0.56%–1.93% for each 100 ppm rise in atmospheric carbon dioxide. Scenario-based climate projections further suggest a 0.25%–10.60% increase in cadmium flux from AMD by 2100. These findings suggest that rising atmospheric carbon dioxide should be considered in global AMD risk assessments and mine-waste remediation planning.</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

Rising atmospheric carbon dioxide ignites metal mobilization in acid mine drainage

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月25日

查看全文
  • Xinxin Wang,
  • Bowen Ji,
  • Hua Li,
  • Ru Wang,
  • Xiaomeng Wang,
  • Lixiang Zhou,
  • Guanyu Zheng

摘要

Rising atmospheric carbon dioxide is projected to exceed 800 ppm by 2100, yet its impact on acid mine drainage (AMD), which is currently contaminating 480,000 km of rivers, remains unclear. Here we combine a global meta-analysis of 82 AMD-associated sites covering diverse climate zones and ore types with laboratory experiments across environmentally relevant carbon dioxide gradients. We find that atmospheric carbon dioxide is the dominant global predictor of the key acid-forming genus Acidithiobacillus. Elevated carbon dioxide enhances microbial carbon fixation and electron transport, accelerates ferrous iron oxidation, intensifies acidification, and subsequently increases cadmium and zinc mobilization by 0.56%–1.93% for each 100 ppm rise in atmospheric carbon dioxide. Scenario-based climate projections further suggest a 0.25%–10.60% increase in cadmium flux from AMD by 2100. These findings suggest that rising atmospheric carbon dioxide should be considered in global AMD risk assessments and mine-waste remediation planning.