| Mineral: |
Montmorillonite |
| Reference: |
MG96a |
| SCM Type: |
CC - Constant Capacitance
(C1: 1.06 F/m2) |
| Ionic Strength: |
0.1 mol/L of
NaCl
|
| Site Type: |
»X-OH |
| PZC: |
8.16 |
| pK1: |
6.09 |
pK1°I=0 (Conversion to I = 0): |
5.98 |
pK12.31 nm−2 (normalized): |
4.24 |
| pK2: |
10.2 |
pK2°I=0 (Conversion to I = 0): |
10.09 |
pK22.31 nm−2 (normalized): |
12.05 |
| Site Density in nm-2: |
0.0324 |
| Original Site Density: |
0.000001 mol / g solid
|
| Solid/Liquid Ratio in g/L: |
2.5 |
| pH Range: |
|
| Temperature in K: |
|
| Method for Site Density: |
Maximum Anion Adsorption |
| Method for Protolysis: | Not Specified |
| Fit Method: | FITEQL |
| Comment: |
PZC=0.5(pK1+pK2) (clay mineral edges); calculation of SSD using SSA and suggested value 2.31sites/nm^2 [DK90] gave values 1-2 orders of magnitude higher than values obtained from experimentally measured maximum anion adsorption (As(V)+P adsorbed at the pH of maximum adsorption) in the binary As(V)/P systems, these values more connsistent with edge surface areas than with BET-N2 areas |
| |
