| Mineral: |
Ferrihydrite |
| Reference: |
DM90 |
| SCM Type: |
DDL - Diffuse Double Layer
|
| Ionic Strength: |
0.0 mol/L of
|
| Site Type: |
»Fe-OH |
| PZC: |
8.0 |
| pK1: |
7.29 |
pK1°I=0 (Conversion to I = 0): |
7.29 |
pK12.31 nm−2 (normalized): |
7.29 |
| pK2: |
8.93 |
pK2°I=0 (Conversion to I = 0): |
8.93 |
pK22.31 nm−2 (normalized): |
8.93 |
| Site Density in nm-2: |
2.3156 |
| Original Site Density: |
0.205 mol / mol metal
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
|
| Temperature in K: |
298.15 |
| Method for Site Density: |
Mean of Different Sources |
| Method for Protolysis: | Mean of Different Sources |
| Fit Method: | graphic extrapolation |
| Comment: |
pK weighted averages of literature titration data, confidence level 95%; SSD: p. 92-93, original values in mol/mol Fe (in Fe2O3*H2O); pK: p. 101 3rd site type required for anion sorption (there is no distinction between strong and weak sites!); PZC in the range 7.9-8.2 with an average value of 8.0 |
| |
