Mineral: |
Hematite |
Reference: |
EABFY13 |
SCM Type: |
DDL - Diffuse Double Layer
|
Ionic Strength: |
0.01 mol/L of
NaCl
|
Site Type: |
»Fe-OH |
PZC: |
7.36 |
pK1: |
6.39 |
pK1°I=0 (Conversion to I = 0): |
6.35 |
pK12.31 nm−2 (normalized): |
6.66 |
pK2: |
8.3 |
pK2°I=0 (Conversion to I = 0): |
8.26 |
pK22.31 nm−2 (normalized): |
8.03 |
Site Density in nm-2: |
4.2800 |
Original Site Density: |
4.28 sites / nm² surface
|
Solid/Liquid Ratio in g/L: |
10.0 |
pH Range: |
3,5 - 10,5 |
Temperature in K: |
288.15 |
Method for Site Density: |
Potentiometric Titration |
Method for Protolysis: | Empirical Correlation |
Fit Method: | FITEQL |
Comment: |
Surface acidity constants at 25 °C were determined from the potentiometric titration at I = 0.01 M, and are referenced to the 1.0M standard state; Constants were determined from the van’t Hoff equation, the enthalpy of proton adsorption (-32.2 kJ mol-1), and the K+ and K- values derived from the 25 °C potentiometric titration. |
|