Mineral: |
Ferrihydrite |
Reference: |
GDB09 |
SCM Type: |
CDM - (CD-)MUSIC |
Ligand: |
Si(OH)4<0>
- Silicic acid
|
Site Type: |
»Fe-singly |
Equation: |
2 »Fe-OH<0.5-> + 4 Si(OH)4<0> ⇔ »Fe2-O2-SiOHOSi3O2(OH)8<2-> + H<1+> + 4 H2O |
LogK: |
8.0 LogK°I=0 (Conversion to I = 0): 7.89
LogK2.31 nm−2 (SSD-normalized): 8.15
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaNO3
|
Temperature: |
298.15 K |
pH Range: |
3.5-12 |
Fit Method: |
MINTEQ |
Comment: |
refitted data from [SW99]; two systems measured: 1 mM H4SiO4 and 37 mM Fe, 1.8 mM H4SiO4 and 1 mM Fe; MO/DFT-calculated CD values of [HVB07] did not fit the data of [SW99] well, so these CD values were fitted |
|