| Mineral: |
Bentonite |
| Reference: |
HM10 |
| SCM Type: |
DDL - Diffuse Double Layer
|
| Ionic Strength: |
0.053 mol/L of
ground water
|
| Site Type: |
»Si-OH |
| PZC: |
|
| pK1: |
|
pK1°I=0 (Conversion to I = 0): |
|
|
| pK2: |
7.62 |
pK2°I=0 (Conversion to I = 0): |
7.53 |
pK22.31 nm−2 (normalized): |
7.66 |
| Site Density in nm-2: |
2.1204 |
| Original Site Density: |
0.000125 mol / g solid
|
| Solid/Liquid Ratio in g/L: |
4.0 |
| pH Range: |
|
| Temperature in K: |
|
| Method for Site Density: |
Potentiometric Titration |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | PHREEQC |
| Comment: |
values from [HMSGB02] but there the constant capacitance model was used; 0.053m at pH=7.4 and 0.068m at pH=8.2; bentonite MX-80 with 80-84% montmorillonite, CEC = 76meq/100mg, The capacitance was introduced in the second paper [HMBF09]; also ion exchange reaction: »XNa + H<1+> = »XH + Na<1+> with logK = 1.0±0.05 |
| |
