Mineral: |
Ferrihydrite |
Reference: |
CZR91 |
SCM Type: |
TL - Triple Layer |
Ligand: |
Cd<2+>
- cadmium
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + Cd<2+> ⇔ »Fe-O-Cd<1+> + H<1+> |
LogK: |
-9.3 ± 0.04
LogK°I=0 (Conversion to I = 0): -8.98
LogK2.31 nm−2 (SSD-normalized): -8.36
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaNO3
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
0.15 g/L |
pH Range: |
5-8.5 |
Ligand Concentration Range: |
1E-6. 1E-7 mol/L |
Fit Method: |
FITEQL |
Comment: |
data were modeled assuming the formation of only outer-sphere complexes; log K depends on initial Cd sorption! -> reflects the heterogeneity of the surface? log K = -9.3 for 1E-6 M Cd and 1E-7M Cd; 0.87 mM Fe = 0.15 g/L Fe2O3*H2O |
|