| Mineral: |
Ferrihydrite |
| Reference: |
D78 |
| SCM Type: |
TL - Triple Layer
(C1: 1.4 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
0.1 mol/L of
NaNO3
|
| Site Type: |
»Fe-OH |
| PZC: |
7.9 |
| pK1: |
5.1 |
pK1°I=0 (Conversion to I = 0): |
4.99 |
pK12.31 nm−2 (normalized): |
5.78 |
| pK2: |
10.7 |
pK2°I=0 (Conversion to I = 0): |
10.59 |
pK22.31 nm−2 (normalized): |
10.02 |
| Site Density in nm-2: |
11.0000 |
| Original Site Density: |
11.0 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
|
| Temperature in K: |
|
| Method for Site Density: |
Tritium Exchange |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | graphic extrapolation |
| Comment: |
SSD from [Y75] (with tritium exchange 11.4 sites/nm^2 with SSA 215 g/m^2) : table 8.2; but in text: SSD for calculations based on mass and is recalculated from raw data of [Y75] ): 0.00985 mol/g with an assumed formula Fe2O3*H2O; citation also in [DJL78], [DL78a], [DL80], [LMB95], [J78], [HL85]; PZC in good agreement with the value 8.0 reported by [Y75]; C1 and C2 from [YLH74] |
| |
