Mineral: |
Goethite |
Reference: |
NS96 |
SCM Type: |
CC - Constant Capacitance
(C1: 2.0 F/m2) |
Ionic Strength: |
0.01 mol/L of
NaNO3
|
Site Type: |
»Fe-OH |
PZC: |
7.42 |
pK1: |
6.25 |
pK1°I=0 (Conversion to I = 0): |
6.21 |
pK12.31 nm−2 (normalized): |
6.25 |
pK2: |
8.59 |
pK2°I=0 (Conversion to I = 0): |
8.55 |
pK22.31 nm−2 (normalized): |
8.59 |
Site Density in nm-2: |
2.2941 |
Original Site Density: |
0.00008 mol / g solid
|
Solid/Liquid Ratio in g/L: |
4.5 |
pH Range: |
|
Temperature in K: |
296.15 |
Method for Site Density: |
Potentiometric Titration |
Method for Protolysis: | Potentiometric Titration |
Fit Method: | graphic extrapolation |
Comment: |
SSD: proton exchange capacity (0.01M NaNO3, adding 0.1M HNO3 in excess, equilibration for 24h at 25°C); pK: graphic extrapolation; ambient CO2 concentrations, room temperature (22-24°C) |
|