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Mine drainage water, often a liability, presents opportunities for reuse and valorization with the right strategies.
Treated water can serve as an industrial source for dust suppression, mineral processing, and equipment washing within mining operations, reducing freshwater demand.
Notably, dissolved metals in this water can be selectively recovered using technologies like selective precipitation and ion exchange, yielding valuable byproducts and offsetting treatment costs (“Selective Recovery of Dissolved Metals from Mine Drainage Using Electrochemical Reactions,” n.d.).
Furthermore, mine workings can act as geothermal reservoirs, allowing mine drainage water to be used for heating and cooling, enhancing energy efficiency (“Geothermal Use of Mine Water,” n.d.).
Even the sludge and solid residues from water treatment are being researched for potential use in construction materials like bricks and aggregate (Hazard Study of Sludge from Mining Wastewater Treatment Systems (Tailings), Accumulation of Contaminants and Potential Utilization Proposals, n.d.), promoting a circular economy approach.
What innovative approaches are you seeing or exploring for the reuse and valorization of mine drainage water in your field or industry? Share your thoughts on the economic and environmental potential!
Reference:
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Geothermal use of mine water. (n.d.). Eurogeologists. Retrieved April 17, 2025, from https://eurogeologists.eu/european-geologist-journal-43-viesca-geothermal-use-of-mine-water/
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Selective Recovery of Dissolved Metals from Mine Drainage Using Electrochemical Reactions. (n.d.). Retrieved April 17, 2025, from https://www.researchgate.net/publication/276470877_Selective_Recovery_of_Dissolved_Metals_from_Mine_Drainage_Using_Electrochemical_Reactions
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Hazard Study of Sludge from Mining Wastewater Treatment Systems (Tailings), Accumulation of Contaminants and Potential Utilization Proposals. (n.d.). Retrieved April 17, 2025, from https://www.mdpi.com/2071-1050/16/23/10569
