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<p>Large volumes of coal mine drainage sludge (CMDS), a byproduct of acid mine drainage (AMD) treatment, impose both environmental and operational burdens. This review comprehensively evaluates the potential of CMDS as a sustainable resource and introduces a novel integrated framework covering its formation mechanisms, physicochemical properties, environmental risks, and application pathways. Rich in iron, aluminum, and manganese oxides, CMDS features a high specific surface area and porosity, making it suitable for use as an adsorbent. Pretreated CMDS can adsorb arsenic at capacities reaching 67 mg g<sup>− 1</sup>, with strong desorption and reusability. When applied as an iron source in Fenton-like oxidation, it achieves up to 98% chemical oxygen demand and total organic carbon removal. In combination with calcium-based wastes, it significantly reduces As, Cu, and Pb leaching by more than 90% in soil. Nevertheless, concerns over secondary metal release persist. This study discusses these limitations and proposes a “dual-core” strategy integrating AMD treatment optimization with targeted CMDS modification, offering a new direction for ecological remediation and circular resource utilization in mining-impacted areas.</p>

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A comprehensive review on the potential application of coal mine drainage sludge as a resource in ecological environment

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月30日

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  • Huanyi Zhu,
  • Wenxing Chen,
  • Yongmei Li,
  • Fang Liu,
  • Qing Li,
  • Yanjun Mao,
  • Long Zhou,
  • Aijiang Yang

摘要

Large volumes of coal mine drainage sludge (CMDS), a byproduct of acid mine drainage (AMD) treatment, impose both environmental and operational burdens. This review comprehensively evaluates the potential of CMDS as a sustainable resource and introduces a novel integrated framework covering its formation mechanisms, physicochemical properties, environmental risks, and application pathways. Rich in iron, aluminum, and manganese oxides, CMDS features a high specific surface area and porosity, making it suitable for use as an adsorbent. Pretreated CMDS can adsorb arsenic at capacities reaching 67 mg g− 1, with strong desorption and reusability. When applied as an iron source in Fenton-like oxidation, it achieves up to 98% chemical oxygen demand and total organic carbon removal. In combination with calcium-based wastes, it significantly reduces As, Cu, and Pb leaching by more than 90% in soil. Nevertheless, concerns over secondary metal release persist. This study discusses these limitations and proposes a “dual-core” strategy integrating AMD treatment optimization with targeted CMDS modification, offering a new direction for ecological remediation and circular resource utilization in mining-impacted areas.