Mineral: |
Goethite |
Reference: |
TS96 |
SCM Type: |
TL - Triple Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + UO2<2+> + 4 H2O ⇔ »Fe-OH2-UO2(OH)4<1-> + 3 H<1+> |
LogK: |
-8.97 ± 0.87
LogK°I=0 (Conversion to I = 0): -8.97
LogK2.31 nm−2 (SSD-normalized): -8.03
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.0 mol/L
NaNO3
|
pH Range: |
4-9 |
Ligand Concentration Range: |
1E-7.1 - 1E-5.4 mol/L |
Fit Method: |
FITEQL |
Comment: |
weighted constants based on experimental data of [HL85] with [U(VI)] = 1E-5M and [T84] with [U(VI)] = 1E-7.1 M to 1E-5.4 M; experiments at IS = 0.1 M NaNO3, corrected to I = 0; sorption reaction not given, only surface species; sorption edge of [HL85] is ~ 1 pH unit lower than that of [T84], discrepancy may be due to uranium loss to sinks other than goethite; significance level 95% (2sigma); solid concentration 0.41 g/L [T84] and 1 g/L [HL85] |
|