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In a study, a harmless food-grade solvent has been used to extract rare-earth metals from coal ash, reducing the amount of ash without damaging the environment and at the same time increasing an important national resource.
A safe food-grade solvent has been employed to extract extremely sought rare-earth metals from coal ash without harming the environment and simultaneously increasing a crucial national resource.
A team of researchers from Sandia, Lawrence Berkeley and Pacific Northwest national laboratories tested a “spongelike” mineral that can...