Economic and Environmental Geology

Fig. 9.

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Fig. 9. Laboratory and pilot scale REE extraction facilities in US. (A) small acid mine drainage (AMD) sludge drying cell, West Virginia University (WVU), (B) rare earth extraction facility using AMD, WVU, (C) rare earth extraction pilot plant using coals and coal refuse, University of Kentucky (UK), (D) rare earth extraction pilot plant using coal combustion ash, UK, (E) rare earth extraction facility using low-rank coals (lignite), University of North Dakota (UND). Photos from US DOE infographics.
Econ. Environ. Geol. 2022;55:241-59 https://doi.org/10.9719/EEG.2022.55.3.241
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