Mineral: |
Hematite |
Reference: |
VT98 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Fe(w)-OH |
Equation: |
»Fe(w)-OH + UO2<2+> + 2 H2O ⇔ »Fe(w)-O-UO2(OH)2<1-> + 3 H<1+> |
LogK: |
-11.7 LogK°I=0 (Conversion to I = 0): -11.66
LogK2.31 nm−2 (SSD-normalized): -11.02
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.01 mol/L
NaCl
|
Temperature: |
299.15 K |
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
4-10 |
Ligand Concentration Range: |
2E-6 mol/L |
Fit Method: |
REACT |
Comment: |
also column experiments; temperature: 26°C, 38°C, 50°C, 76°C; binding constants at the higher temperatures were not estimated (no acidity constants available); up to 50°C slight increase in the binding of uranium at lower to neutral pH, little effect on binding at neutral and higher pH |
|