Mineral: |
Montmorillonite |
Reference: |
BDP00 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
Pb<2+>
- lead
|
Site Type: |
»X-OH |
Equation: |
»X-OH + Pb<2+> ⇔ »X-O-Pb<1+> + H<1+> |
LogK: |
1.56 ± 0.1
LogK°I=0 (Conversion to I = 0): 1.56
LogK2.31 nm−2 (SSD-normalized): 5.68
|
Experiment: |
Potentiometric Titration |
Ionic Strength: |
0.0 mol/L
NaNO3
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
4-8 |
Ligand Concentration Range: |
1E-4. 2E-4. 4E-4 mol/L |
Fit Method: |
FITEQL |
Comment: |
combined with cation exchange: main sorption phenomena ion exchange 2=XNa + Pb2+ = =X2Pb + 2Na+ logK=9.85+-0.11; at low pH competition with protons is very important |
|