Mineral: |
Bentonite |
Reference: |
CJGMW14 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
PO4<3->
- phosphate
|
Site Type: |
»Al-OH |
Equation: |
»Al-OH + PO4<3-> + Eu<3+> + H<1+> ⇔ »Al-PO4Eu<1+> + H2O |
LogK: |
25.55 LogK°I=0 (Conversion to I = 0): 27.58
LogK2.31 nm−2 (SSD-normalized): 23.94
|
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 4; Model 1 selected as the second sub-model for the ternary system; [Eu(III)] = 2.5E-6 and 5.08E-8 mol/L; S/L ratio = 0.5, 1, 3 g/L; original equation in the article: »Al-OH + HPO4<2-> + Eu<3+> = »Al-PO4Eu<1+> + H2O with logK = 13.2, conversion on the basis of logK values from the Nagra/PSI Chemical Thermodynamic Data Base
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