| Mineral: |
Bentonite |
| Reference: |
SVSBC98 |
| SCM Type: |
DDL - Diffuse Double Layer |
| Ligand: |
UO2<2+>
- uranyl(VI)
|
| Site Type: |
»X-OH |
| Equation: |
»X-OH + 2 UO2<2+> + CO3<2-> + 3 H2O ⇔ »X-O-(UO2)2CO3(OH)3<2-> + 2 H<1+> |
| LogK: |
11.54 LogK°I=0 (Conversion to I = 0): 12.61
LogK2.31 nm−2 (SSD-normalized): 15.48
|
| Experiment: |
Batch Sorption Experiments |
| Ionic Strength: |
0.1 mol/L
granitic water
|
| Temperature: |
298.0 K |
| Solid/Liquid Ratio: |
1.98 g/L |
| pH Range: |
4-11 |
| Ligand Concentration Range: |
6.67E-7 mol/L |
| Fit Method: |
FITEQL |
| Comment: |
recaculation of the given equation: »X-OH + H<1+> = »X-OH2<1+> logK2 =- pK1; »X-OH2<1+>+(UO2)2(OH)3CO3<1->=»X-OH2-UO2(CO3)3<3-> logK7; 2UO2<2+>+HCO3<1->+3H2O=(UO2)2(OH)3CO3<1->+4H<1+> logKU5=-11.22; »X-OH+UO2<2+>+H<1+>+2CO3<2->=»X-OH2-UO2(CO3)2<3-> logK7+logKU4+logK2; CO3<2->+H<1+>=HCO3<1-> logKCO3=10.327; »X-OH+2UO2<2+>+3H2O+CO3<2->=»X-OH2-(UO2)2(OH)3CO3 logK7++logKU5+logKCO3+logK2 |
| |
