Mineral: |
α-MnO2 |
Reference: |
KSCKT18 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
UO2<2+>
- uranyl(VI)
|
Site Type: |
»Mn-OH |
Equation: |
2 »Mn-OH + UO2<2+> + 2 CO3<2-> ⇔ (»Mn-O)2-UO2(CO3)2<4-> + 2 H<1+> |
LogK: |
6.35 LogK°I=0 (Conversion to I = 0): 6.80
LogK2.31 nm−2 (SSD-normalized): 12.94
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.01 mol/L
NaClO4
|
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
2 - 11 |
Ligand Concentration Range: |
8.2E-5 mol/L |
Fit Method: |
FITEQL |
Comment: |
Aerobic system;
Original reaction equation given as: 2(»MnOH) + UO2(CO3)2<2-> = (»MnO)2-UO2(CO3)2<4-> + 2 H<1+> with logK = -10.24; log K for U(VI) carbonate from [KKT12] table1; other conversion data from: logK1 = -6.366 for the reaction H2CO3 = H<1+> + HCO3<1-> [FNK96], logK2 = -10.329 for HCO3<1-> = H<1+> + CO3<2->[GFFGN03] --> so for H2CO3 = 2H<1+> + CO3<2-> the logK = -16.695 |
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