Mineral: |
Ferrihydrite |
Reference: |
USBR08 |
SCM Type: |
NE - Non-electrostatic |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»X-OH |
Equation: |
»X-OH + UO2<2+> + CO3<2-> ⇔ »X-O-UO2HCO3 |
LogK: |
17.169 LogK°I=0 (Conversion to I = 0): 17.17
LogK2.31 nm−2 (SSD-normalized): 19.95
|
Ionic Strength: |
0.0 mol/L
NaNO3
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
6-11 |
Ligand Concentration Range: |
1E-06 mol/L |
Fit Method: |
FITEQL |
Comment: |
non-electrostatic general composite approach; logK = 6.84 is the original U(VI) surface-reaction constant obtained from U(VI) sorption on ferrihydrite at different pHs; original reaction equation in the article: »X-OH + UO2<2+> + HCO3<1-> = »X-O-UO2HCO3 + H<1+> with logK = 6.84, thermodynamic data for the conversion of the equation taken from [GFFGN03] |
|