Mineral: |
Bentonite |
Reference: |
GZJCW21 |
SCM Type: |
NE - Non-electrostatic |
Ligand: |
Am<3+>
- americium
|
Site Type: |
»Al(s)-OH |
Equation: |
»Al(s)-OH + Am<3+> ⇔ »Al(s)-O-Am<2+> + H<1+> |
LogK: |
2.7 LogK°I=0 (Conversion to I = 0): 3.56
LogK2.31 nm−2 (SSD-normalized): -1.75
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaCl
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
0.5 g/L |
pH Range: |
3 - 10 |
Ligand Concentration Range: |
6E-10 mol/L |
Fit Method: |
PHREEQC |
Comment: |
also ion exchange modeled: 3»XNa + Am<3+> = (»X)3Am + 3Na<1+>, log K = 2.0;
log K values also used for modeling the sorption of Am<3+> on Ca-bentonites, in addition a cation exchange reaction between »XNa<1+> and Ca<2+> is included: »XNa + 0.5Ca<2+> = »XCa0.5 + Na<1+>, log K = 0.4
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