Mineral: |
Bentonite |
Reference: |
CJGMW14 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
PO4<3->
- phosphate
|
Site Type: |
»Al-OH |
Equation: |
2 »Al-OH + PO4<3-> + H2O ⇔ (»Al)2-HPO4 + 3OH<1-> |
LogK: |
-2.75 LogK°I=0 (Conversion to I = 0): -1.79
LogK2.31 nm−2 (SSD-normalized): -5.96
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaCl
|
Temperature: |
295.0 K |
pH Range: |
2-10 |
Ligand Concentration Range: |
2E-5; 2E-4 mol/L |
Fit Method: |
PHREEQC |
Comment: |
Model 2; S/L ratio = 0.5, 1, 3 g/L; original equation in the article: 2»Al-OH + HPO4<2-> = (»Al)2-HPO4 + 2OH<1-> with logK = -1.1, conversion on the basis of logK values from the Nagra/PSI Chemical Thermodynamic Data Base |
|