From: Alkali treatment–acid leaching of rare earth elements from phosphogypsum fertilizer: insight for additional resource of valuable components
Element
Concentration
(mg/kg)
La
98.5
Ce
211.3
Pr
19.8
Nd
–
Sm
Er
67.3
Y
12.8
Yb
Total REEs
~ 409.7 mg/kg ~ 85.2%