fig11

Alkali pretreatment effects on acid leaching recovery of rare earth elements from coal waste of the Western Kentucky No. 13 and Fire Clay seams

Figure 11. Leaching recoveries of Al obtained from the alkali pretreatment of the (A) Western Kentucky No. 13 and (B) Fire Clay coal wastes with NaOH solutions of different concentrations.

Minerals and Mineral Materials
ISSN 2832-269X (Online)

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