Table 4 Distribution of REE occurrence modes in the three size fractions S1 (< 0.25 mm), S2 (0.25–0.5), S3 (0.5–2 mm).
Sample | TREE content | TREE: Physically adsorbed | TREE: Chemically adsorbed | TREE: Desorbable | TREE: Mineralized |
|---|---|---|---|---|---|
mg/kg | (%) | (%) | (%) | (%) | |
S1 | 4603.9 | 31 | 8 | 39 | 61 |
S2 | 2785.3 | 40 | 5 | 45 | 55 |
S3 | 1653.4 | 24 | 5 | 29 | 71 |
