| Mineral: |
Beidellite |
| Reference: |
TZMS96 |
| SCM Type: |
TL - Triple Layer
(C1: 1.05 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
NaCl
|
| Site Type: |
»X-OH |
| PZC: |
8.5 |
| pK1: |
|
| |
| pK2: |
|
| |
| Site Density in nm-2: |
0.7117 |
| Original Site Density: |
0.000117 mol / g solid
|
| Solid/Liquid Ratio in g/L: |
9.49 |
| pH Range: |
4-10 |
| Temperature in K: |
298.15 |
| Method for Site Density: |
Geometrical Calculation |
| Method for Protolysis: | Batch Sorption Experiments |
| Fit Method: | FITEQL |
| Comment: |
SSD computed from particle size and crystallographic data [ZS94] 1.17E-4 mol/g (=0.71 sites/nm^2); SSD by tritium exchange 86.1E-5 mol/g (=5.2 sites/nm^2); pK2 value for Si-sites from [ZS94] (is from [R82a] for quartz); pK values for Al-sites cited as from [MZST95] (is wrong, there 12.3/13.6); experiments in 0.001 and 0.01 M NaCl; solid concentration 9.49 g/kg; for composite model: gibbsite 11 m2/g, SSD 4 sites/nm^2, C1 0.8 F/^2; amorphous silica 183 m^2/g, SSD 4.5 sites/nm^2 (from [R82a] for quartz with 4.15 m^2/g), C1=1.3 F/m^2 |
| |
| Mineral: |
Beidellite |
| Reference: |
TZMS96 |
| SCM Type: |
TL - Triple Layer
(C1: 1.05 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
NaCl
|
| Site Type: |
»Si-OH |
| PZC: |
8.5 |
| pK1: |
|
| |
| pK2: |
6.95 |
| |
| Site Density in nm-2: |
|
| Original Site Density: |
|
| Solid/Liquid Ratio in g/L: |
9.49 |
| pH Range: |
4-10 |
| Temperature in K: |
298.15 |
| Method for Site Density: |
Geometrical Calculation |
| Method for Protolysis: | Batch Sorption Experiments |
| Fit Method: | FITEQL |
| Comment: |
SSD computed from particle size and crystallographic data [ZS94] 1.17E-4 mol/g (=0.71 sites/nm^2); SSD by tritium exchange 86.1E-5 mol/g (=5.2 sites/nm^2); pK2 value for Si-sites from [ZS94] (is from [R82a] for quartz); pK values for Al-sites cited as from [MZST95] (is wrong, there 12.3/13.6); experiments in 0.001 and 0.01 M NaCl; solid concentration 9.49 g/kg; for composite model: gibbsite 11 m2/g, SSD 4 sites/nm^2, C1 0.8 F/^2; amorphous silica 183 m^2/g, SSD 4.5 sites/nm^2 (from [R82a] for quartz with 4.15 m^2/g), C1=1.3 F/m^2 |
| |
| Mineral: |
Beidellite |
| Reference: |
TZMS96 |
| SCM Type: |
TL - Triple Layer
(C1: 1.05 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
NaCl
|
| Site Type: |
»Al-OH |
| PZC: |
8.5 |
| pK1: |
7.6 |
| |
| pK2: |
10.6 |
| |
| Site Density in nm-2: |
|
| Original Site Density: |
|
| Solid/Liquid Ratio in g/L: |
9.49 |
| pH Range: |
4-10 |
| Temperature in K: |
298.15 |
| Method for Site Density: |
Geometrical Calculation |
| Method for Protolysis: | Batch Sorption Experiments |
| Fit Method: | FITEQL |
| Comment: |
SSD computed from particle size and crystallographic data [ZS94] 1.17E-4 mol/g (=0.71 sites/nm^2); SSD by tritium exchange 86.1E-5 mol/g (=5.2 sites/nm^2); pK2 value for Si-sites from [ZS94] (is from [R82a] for quartz); pK values for Al-sites cited as from [MZST95] (is wrong, there 12.3/13.6); experiments in 0.001 and 0.01 M NaCl; solid concentration 9.49 g/kg; for composite model: gibbsite 11 m2/g, SSD 4 sites/nm^2, C1 0.8 F/^2; amorphous silica 183 m^2/g, SSD 4.5 sites/nm^2 (from [R82a] for quartz with 4.15 m^2/g), C1=1.3 F/m^2 |
| |
