Mineral: |
Goethite |
Reference: |
CBRZ04 |
SCM Type: |
CC - Constant Capacitance |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + UO2<2+> + PO4<3-> + H<1+> ⇔ »Fe-PO4UO2 + H2O |
LogK: |
27.95 LogK°I=0 (Conversion to I = 0): 29.45
LogK2.31 nm−2 (SSD-normalized): 28.89
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaNO3
|
Temperature: |
295.0 K |
Solid/Liquid Ratio: |
33.3 g/L |
pH Range: |
3-9 |
Ligand Concentration Range: |
5E-6M UO2<2+>. 4E-5 - 1E-3 M PO4<3-> mol/L |
Fit Method: |
FITEQL |
Comment: |
total Fe concentration 3.15E-3 M; also 3.3 g/L with total Fe concentration 3.15E-4 M; original reaction equation in the study: »Fe-OH + UO2<2+> + H2PO4<-> = »Fe-UO2PO4 + H<1+> + H2O with logK = 10.60; formation constant in aqueous solution (I = 0, 25 °C): H2PO4<2-> = 2 H<1+> + PO4<3-> logK = -17.35 [NLS92] |
|