Mineral: |
Kaolinite |
Reference: |
WWD98 |
SCM Type: |
DDL - Diffuse Double Layer
|
Ionic Strength: |
0.1 mol/L of
NaNO3
|
Site Type: |
»X-OH |
PZC: |
8.9 |
pK1: |
|
pK1°I=0 (Conversion to I = 0): |
|
|
pK2: |
|
pK2°I=0 (Conversion to I = 0): |
|
|
Site Density in nm-2: |
1.2546 |
Original Site Density: |
0.0001 mol / L solution
|
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: | FITEQL |
Comment: |
only »Al-OH and »Si-OH sites located at the edges are acrive; crystallographic site density (»Al-OH) from [S84]=2 sites/nm^2, crystallographic site density (»Si-OH) from [R82]=6 sites/nm^2; calculated PZC=1/2(pK1+pK2)=8.42; pK values also estimated for 0.001 (6.68/7.63) and 0.01 N (8.04/9.13) NaNO3; SSD für [»Si-OH]+[»Al-OH]=9.97E-5 mol/L weighted mean SSD 7.7E-5 mil/L; weighted mean pK 7.57/9.23; in publication wrong sign of pK and switched !; CO2 free water |
|
Mineral: |
Kaolinite |
Reference: |
WWD98 |
SCM Type: |
DDL - Diffuse Double Layer
|
Ionic Strength: |
0.1 mol/L of
NaNO3
|
Site Type: |
»Al-OH |
PZC: |
8.9 |
pK1: |
8.83 |
pK1°I=0 (Conversion to I = 0): |
8.72 |
|
pK2: |
10.8 |
pK2°I=0 (Conversion to I = 0): |
10.69 |
|
Site Density in nm-2: |
|
Original Site Density: |
|
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: | FITEQL |
Comment: |
only »Al-OH and »Si-OH sites located at the edges are acrive; crystallographic site density (»Al-OH) from [S84]=2 sites/nm^2, crystallographic site density (»Si-OH) from [R82]=6 sites/nm^2; calculated PZC=1/2(pK1+pK2)=8.42; pK values also estimated for 0.001 (6.68/7.63) and 0.01 N (8.04/9.13) NaNO3; SSD für [»Si-OH]+[»Al-OH]=9.97E-5 mol/L weighted mean SSD 7.7E-5 mil/L; weighted mean pK 7.57/9.23; in publication wrong sign of pK and switched !; CO2 free water |
|