fig9
![Alkali pretreatment effects on acid leaching recovery of rare earth elements from coal waste of the Western Kentucky No. 13 and Fire Clay seams](https://image.oaes.cc/020683d7-f854-43cd-b83e-bde768784680/4853.fig.9.jpg)
Figure 9. BSE images of (A) WAL 41 and (B) FAL 34 particles. BSE: Backscattered electron.
Figure 9. BSE images of (A) WAL 41 and (B) FAL 34 particles. BSE: Backscattered electron.
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