Table 2: Chemical composition of leaching solution after applying the optimum conditions for leaching REEs and U(VI).
| Elements | Conc.,% | Elements | Conc.,% |
| RE2O3 | 1.85 | U3O8 | 218 ppm |
| Fe2O3 | 12.58 | Na2O3 | 1.85 |
| MnO2 | 4.30 | K2O | 0.79 |
| CaO | 2.77 | SiO2 | 14.88 |
| MgO | 2.20 | Al2O3 | 5.64 |
| P2O5 | 1.55 |