| Mineral: |
Goethite |
| Reference: |
S06c |
| SCM Type: |
TL - Triple Layer
(C1: 0.9 F/m2) |
| Ionic Strength: |
NaCl
|
| Site Type: |
»Fe-OH |
| PZC: |
7.6 |
| pK1: |
4.8 |
|
pK12.31 nm−2 (normalized): |
5.44 |
| pK2: |
10.4 |
|
pK22.31 nm−2 (normalized): |
9.76 |
| Site Density in nm-2: |
10.0000 |
| Original Site Density: |
10.0 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
|
| Temperature in K: |
298.15 |
| Method for Site Density: |
| Method for Protolysis: | Literature |
| Fit Method: | graphic extrapolation |
| Comment: |
pK1 and pK2 were calculated from the values pH(ZPC) and deltapKn(0); equilibrium constants in this study refer to site-occupancy standard state with hypothtical 1.0 M ionic strength (K°) and values for N' = 10 * 10^18 m^-2 and A' = 10 m²/g [S05] using the equation: K = K°(Ns * As/N' * A'), where Ns represents the SSD = 16.4 sites/nm² from [BM81] and As the SSA = 51.8 m²/g from [BM81]; regression of proton surface charge data in the present study; pH(ZPC) calculated from experimental pH(PZSE) = 7.5 [BM81] using equation 31 |
| |
