Mineral: |
Ferrihydrite |
Reference: |
MCJ09 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Fe(w)-OH |
Equation: |
»Fe(w)-OH + UO2<2+> + CO3<2-> ⇔ »Fe(w)-O-UO2CO3<1-> + H<1+> |
LogK: |
9.034
LogK2.31 nm−2 (SSD-normalized): 10.76
|
Experiment: |
Literature |
Ionic Strength: |
NaNO3
|
Temperature: |
298.15 K |
pH Range: |
<6.33 |
Ligand Concentration Range: |
1E-4; 1E-5; 1E-6; 8.4E-6; 4.2E-6 mol/L |
Fit Method: |
UCODE_2005 |
Comment: |
refitted data from [WDPWX94], [P99], [MST95], [WKM03] and [FDZ06]; 10 data sets; source of thermodynamic data: WATEQ4F; mostly open systems with 1E-3.5 atm CO2 (g); re-estimation of constants by coupling the geochemical computer code PHREEQC with UCODE_2005 (automated parameter optimization program); S/L ratio: 0.0089 g/L to 1.78 g/L |
|