Mineral: |
Kaolinite |
Reference: |
EPH13 |
SCM Type: |
NE - Non-electrostatic |
Ligand: |
Eu<3+>
- europium(III)
|
Site Type: |
»X(s)-OH |
Equation: |
»X(s)-OH + Eu<3+> + H2O ⇔ »X(s)-O-Eu(OH)<1+> + 2 H<1+> |
LogK: |
-7.0 LogK°I=0 (Conversion to I = 0): -6.06
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.5 mol/L
NaNO3
|
Solid/Liquid Ratio: |
2.0 g/L |
pH Range: |
3 - 10 |
Ligand Concentration Range: |
1E-8 mol/L |
Fit Method: |
PHREEQC |
Comment: |
Ion exchange: 3Z<1-> + Eu<3+> = EuZ3, log K = 4.0; Na<1+> + Z<1-> = NaZ, log K = 0.0; Z<1-> + H<1+> = HZ, log K = 0.0
The parameters for sorption model were adjusted using the data from the highest ionic strength 0.5 M NaNO3. For the two lower ionic strengths 0.1 M and 0.05 M the parameters had to be readjusted in order to fit the experimental results. |
|