Presentation Information
[3K0504-06-01]A Review on Recent Metal Recovery Strategies from Acid Mine Drainage and their Upscaling Potential
○Dayle Tranz Dano1[Student presentation: Doctoral course], Ilhwan Park1, Mayumi Ito1 (1. Hokkaido University)
Chairperson: ジョン サンヒ（秋田大学）、パク イルファン（北海道大学）
Keywords:
acid mine drainage,secondary metal resources,circular economy
Acid mine drainage (AMD) is one of the most critical and persistent geochemical pollutants associated with mining activities worldwide. Generated through the oxidation of sulfide minerals, AMD is characterized by low pH and elevated concentrations of dissolved metals. Traditionally, AMD has been regarded solely as an environmental liability, with research and studies primarily focused on mitigation, containment, and compliance with discharge regulations. However, the increasing global demand for critical and strategic metals has renewed interest in AMD as a potential secondary resource, shifting the paradigm from waste treatment toward resource recovery and valorization. This review critically examines recent advances in metal recovery technologies applied to AMD, with particular emphasis on their potential for upscaling implementation. Recovery strategies reported in the literature are systematically categorized according to their dominant mechanisms: (i) chemical and physicochemical, (ii) biological, (iii) electrochemical, and (iv) integrated or hybrid. For each category, key operational principles, target metals, and performance trends are discussed. Furthermore, this review evaluates the upscaling potential of reported technologies using three critical dimensions: metal recovery performance, quality of the treated effluent (final pH, final metal concentration levels) , and economic feasibility (reagent demand, energy requirements, downstream processing needs, final metal form). By identifying common technological and economical bottlenecks and knowledge gaps, this review provides a framework to compare and assess which metal recovery pathways are most promising for sustainable AMD management. The findings aim to support the development of studies and treatment strategies that align metal recovery, environmental remediation, and circular economy.