Mineral: |
Ferrihydrite |
Reference: |
ZB04a |
SCM Type: |
NE - Non-electrostatic |
Ligand: |
NpO2<1+>
- neptunyl(V)
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + NpO2<1+> + H2O ⇔ »Fe-OH-NpO3<1-> + 2 H<1+> |
LogK: |
-11.26 LogK°I=0 (Conversion to I = 0): -11.37
LogK2.31 nm−2 (SSD-normalized): -10.32
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
|
Temperature: |
298.15 K |
Ligand Concentration Range: |
4.5E-13 -4.5E-11. 4.7E-12. 6E-06 mol/L |
Fit Method: |
FITEQL |
Comment: |
average non-electrostatic SC constant of 10 curves from [GASM91] (sorption on Fe(OH)3) and [NS91] (sorption on FeOOH); the log K of >FeOHNpO3<1-> varied significantly --> as a conservative estimate, the lowest fitted log K constant was used |
|