Mineral: |
Kaolinite |
Reference: |
DTDW12 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»X-OH |
Equation: |
2 »X-OH<0.5-> + UO2<2+> + CO3<2-> ⇔ (»X-OH)2-UO2CO3<1-> |
LogK: |
16.58 LogK°I=0 (Conversion to I = 0): 16.94
LogK2.31 nm−2 (SSD-normalized): 16.20
|
Ionic Strength: |
0.01 mol/L
NaNO3
|
Temperature: |
298.0 K |
Solid/Liquid Ratio: |
5.0 g/L |
pH Range: |
3-8.5 |
Ligand Concentration Range: |
1E-6 mol/L |
Fit Method: |
Comment: |
original reaction equation in the study: 2 »Si-OH<0.5-> + UO2<2+> + H2CO3 = (»Si-OH)2-UO2CO3<1-> + 2 H<1+> with logK = -0.1, formation constant in aqueous solution: H2CO3 = CO3<2-> + 2H<1+> logK = -16.68 [SM96a]
only valid in combination with other surface reactions and constants (see article) |
|