The US Could Have a $100 Billion Stash of Rare Earth Elements – Hiding in Coal Waste
A homegrown supply.
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Rare earth elements have become indispensable to modern technology, powering everything from smartphones to military aircraft. These 17 metals are essential for renewable energy systems, medical devices, and defense applications, yet their supply remains heavily concentrated in China, which controls roughly 70 percent of global production. This dependency has raised concerns about national security and economic stability in other countries seeking to develop independent supply chains.
Recent research reveals an unexpected solution to this supply challenge: vast quantities of rare earth elements lie dormant in coal ash, the residue left after coal combustion at power plants across the United States. Scientists at the University of Texas at Austin estimate that American coal ash could contain nearly $100 billion worth of extractable rare earth elements. The concentration of these valuable metals in coal ash is remarkably high—up to 10 times greater than in raw coal—making it an attractive source for recovery efforts.
Multiple research teams are developing promising extraction techniques to recover these elements efficiently and sustainably. Engineers at Monash University in Australia have achieved 90 percent recovery rates using environmentally benign acids, while researchers at Northeastern University have tripled yields from conventional extraction methods. Alternative approaches under investigation include green leaching solutions, electrochemical processes, and even biological methods using specially selected plants to accumulate rare earth elements.
Successfully commercializing these extraction methods could transform America’s rare earth supply landscape while simultaneously addressing environmental waste management challenges. The transition to a circular economy model would reduce reliance on imports and turn coal ash landfills into valuable resource reservoirs.
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Originally reported by Sciencealert →
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