Mineral: |
Ferrihydrite |
Reference: |
FDZ06 |
SCM Type: |
TL - Triple Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Fe(s)-OH |
Equation: |
2 »Fe(s)-OH + UO2<2+> ⇔ (»Fe(s)-O)2-UO2 + 2 H<1+> |
LogK: |
-2.2 LogK°I=0 (Conversion to I = 0): -2.20
LogK2.31 nm−2 (SSD-normalized): -2.03
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.0 mol/L
NaNO3
|
Temperature: |
298.15 K |
pH Range: |
3.5-9 |
Ligand Concentration Range: |
1E-8 - 1E-4 mol/L |
Fit Method: |
FITEQL |
Comment: |
gas phase air - 2% CO2: experiments in 0.004-0.5M NaNO3; 1E-3 - 1E-4 M Fe for sorption experiments; species cited as (=SO)2UO2; U(VI) surface species form bidentate bonds that consume two surface sites in mass balance for sites but have an exponent of one site in this mass law |
|