Mineral: |
Ferrihydrite |
Reference: |
DM90 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
Si(OH)4<0>
- Silicic acid
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + Si(OH)4<0> ⇔ »Fe-SiO3<1-> + H<1+> + 2 H2O |
LogK: |
-7.24
LogK2.31 nm−2 (SSD-normalized): -5.25
|
Experiment: |
Empirical Correlation |
Ionic Strength: |
|
Fit Method: |
Comment: |
original reaction equation in this study given as »Fe-OH + SiO3<2-> + H<1+> = »Fe-SiO3<1-> + H2O with logK = 15.9; conversion done with the equations Si(OH)4(aq) = 2H<1+> + SiO2(OH)2<2->, Si(OH)4(aq) = 2H<1+> + H2O + SiO3<2-> with logK = -23,140 [GFFGN03] |
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