Mineral: |
Ferrihydrite |
Reference: |
CZR91 |
SCM Type: |
TL - Triple Layer |
Ligand: |
Ca<2+>
- calcium
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + Ca<2+> + H2O ⇔ »Fe-O-Ca(OH) + 2 H<1+> |
LogK: |
-15.0 ± 0.09
LogK2.31 nm−2 (SSD-normalized): -14.06
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
NaNO3
|
Temperature: |
298.15 K |
pH Range: |
4.5-10.5 |
Ligand Concentration Range: |
1E-4 mol/L |
Fit Method: |
FITEQL |
Comment: |
data were modeled assuming the formation of only outer-sphere complexes ((=FeO)2-Ca and =FeO-CaOH); log K depends on initial Ca sorption and ionic strength! -> reflects the heterogeneity of the surface?; given value for 1E-4M Ca and I = 0.5, 0.1 and 0.005 M |
|