| Mineral: |
Magnetite |
| Reference: |
CDO98 |
| SCM Type: |
DDL - Diffuse Double Layer
|
| Ionic Strength: |
0.1 mol/L of
NaNO3
|
| Site Type: |
»Fe-OH |
| PZC: |
5.55 |
| pK1: |
4.41 |
pK1°I=0 (Conversion to I = 0): |
4.30 |
pK12.31 nm−2 (normalized): |
4.69 |
| pK2: |
6.22 |
pK2°I=0 (Conversion to I = 0): |
6.11 |
pK22.31 nm−2 (normalized): |
5.94 |
| Site Density in nm-2: |
4.4425 |
| Original Site Density: |
0.000135 mol / g solid
|
| Solid/Liquid Ratio in g/L: |
2.0 |
| pH Range: |
|
| Temperature in K: |
|
| Method for Site Density: |
Potentiometric Titration |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: |
| Comment: |
PZC determined equal to 5.55+-0.12 (titrations at different ionic strengths 1...0.01), lower than assumed (6.5): reason is presence of silica as impurity, ; SSD given 1.35 mol/g and calculated 4.44 sites/nm^2 !, SSD recalculated 1.39 mol/g (must be *10E-4!) |
| |
