| Mineral: |
Goethite |
| Reference: |
RL97 |
| SCM Type: |
TL - Triple Layer
(C1: 1.6 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
0.0 mol/L of
NaClO4
|
| Site Type: |
»Fe-OH |
| PZC: |
8.9 |
| pK1: |
7.15 |
pK1°I=0 (Conversion to I = 0): |
7.15 |
pK12.31 nm−2 (normalized): |
7.70 |
| pK2: |
10.65 |
pK2°I=0 (Conversion to I = 0): |
10.65 |
pK22.31 nm−2 (normalized): |
10.10 |
| Site Density in nm-2: |
8.1600 |
| Original Site Density: |
8.16 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
10.0 |
| pH Range: |
4-10 |
| Temperature in K: |
|
| Method for Site Density: |
Best Estimate |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | FITEQL |
| Comment: |
modified triple layer model: slight variation in the way electrolyte/surface interactions, assumption that beta-plane electrolyte ions nonspecifically screen surface (0-plane) charge; multiple ionic strength, ionic strength 0.0116, 0.0316, 0.1 M; PZC from [VRL94]; cited in [RL98]; WSOS/DF=6.4 |
| |
