Best leachates (0.5M (NH₄)₂SO₄, 30 min): up to 667 mg/kg of DREO (total desorbable rare earth oxide) (“DREO”) and up to 278 mg/kg of magnetic rare earth oxide (“MREO”) (Nd+Pr+Dy+Tb), showing ionic ...
Magnet REEs dominate the leachate (>40% of dissolved REO). The magnet rare-earth oxides (MREO = Nd₂O₃ + Pr₆O₁₁ + Dy₂O₃ + Tb₄O₇) constituted over 40% of the dissolved REO in Verde’s best PLS samples—an ...
Notes: DREO and element grades above are measured directly in the primary leach solution (PLS) from ion-exchange tests; Head grades are from the same trench intervals. ND = not detected. Magnet REEs ...