| Mineral: |
Calcite |
| Reference: |
ZRHSK05 |
| SCM Type: |
CC - Constant Capacitance |
| Ligand: |
NpO2<1+>
- neptunyl(V)
|
| Site Type: |
»Ca-OH |
| Equation: |
»Ca-OH + NpO2<1+> + 2 CO3<2-> ⇔ »Ca-O-NpO2(CO3)2<4-> + H<1+> |
| LogK: |
38.71 LogK°I=0 (Conversion to I = 0): 38.71
LogK2.31 nm−2 (SSD-normalized): 34.19
|
| Experiment: |
Batch Sorption Experiments |
| Ionic Strength: |
0.0 mol/L
|
| Temperature: |
298.15 K |
| Solid/Liquid Ratio: |
1.25 g/L |
| pH Range: |
7.5-9.75 |
| Ligand Concentration Range: |
1E-7 mol/L |
| Fit Method: |
FITEQL |
| Comment: |
background electrolyte calcite equilibrated solution; 24h, 0.03% CO2; if only the »Ca-CO3NpO2CO3<2-> species is included in the fit, logK=-1.14 and the overall fit to the data is still reasonably good; ATTENTION: error in fitting code produced incorrect values. All values need to be increase by +8 log units. (correct 6.20 instead of -1.54 in table 3); original reaction equation in the article: »Ca<+> + NpO2<1+> + 2 HCO3<1-> = »Ca-CO3NpO2CO3<2-> + 2 H<1+> with logK = 6.2, conversion done with the reaction HCO3<1-> = CO3<2-> + H<1+> and logK = -10,33 [JL97] and converted to »CaOH surface species with data taken from Table 2. |
| |
