Mineral: |
Kaolinite |
Reference: |
EPH13 |
SCM Type: |
NE - Non-electrostatic |
Ligand: |
Nb(OH)5<0>
- niobium(V) hydroxyde
|
Site Type: |
»X(w)-OH |
Equation: |
»X(w)-OH + Nb(OH)5<0> + H2O ⇔ »X(w)-O-Nb(OH)6<2-> + 2 H<1+> |
LogK: |
-6.96
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
ground water
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
6 - 11 |
Ligand Concentration Range: |
1E-8 mol/L |
Fit Method: |
PHREEQC |
Comment: |
Best fit from OLSR (saline ground water) was applied to other waters (Figures Nb-4-6). Since the speciation in other waters is similar and the modeling results are the same as for OLSR, the other modeling results are not presented.
Original equation in the study: »X-OH + Nb(OH)7<2-> = »X-O-Nb(OH)6<2-> + H2O with logK = 7.0, thermodynamic reactions and their equilibrium constants taken from the ThermoChimie Version 7b database |
|