Copper from Legacy Mine Water: A Hidden Opportunity Emerges
The global copper supply is facing significant challenges, but one often-overlooked opportunity could provide a substantial boost. Legacy mine water, which has been treated as an environmental problem for decades, now holds potential as a recoverable asset.
Historic copper mining districts in Arizona and the American Southwest have left behind centuries of extraction infrastructure and environmental damage. However, the same ore bodies responsible for these issues also deposited substantial concentrations of dissolved copper in associated water bodies, pit lakes, and acid mine drainage systems.
Copper recovery from legacy mine water is not a new concept, but recent technological advancements, particularly electrochemical membrane filtration, have made it economically interesting. This process eliminates reagent costs and waste disposal obligations, making it competitive with conventional primary copper production benchmarks.