Mineral: |
Goethite |
Reference: |
TS96 |
SCM Type: |
TL - Triple Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + 2 UO2<2+> + CO3<2-> + 3 H2O ⇔ »Fe-OH2-(UO2)2CO3(OH)3 + 2 H<1+> |
LogK: |
14.6 ± 0.84
LogK°I=0 (Conversion to I = 0): 14.60
LogK2.31 nm−2 (SSD-normalized): 15.54
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.0 mol/L
NaNO3
|
pH Range: |
4-9 |
Ligand Concentration Range: |
1E-6.7 - 1E-5.4 mol/L |
Fit Method: |
FITEQL |
Comment: |
weighted constant based on combined experimental data of [T84] with [U(VI)]=1E-6.7 - 1E-5.4 and pCO2=1E-3.48 atm and [HL85] with [U(VI)] = 1E-5M, total carbon conentration 1E-3 and 1E-2 M; experiments at IS = 0.1 M NaNO3, corrected to IS = 0; sorption reaction not given, only surface species; sorption envelope defined by the data of [HL85] is generally wider than that of [T84] -> calculated binding constants are typically larger; significance level 95% (2sigma) |
|