Mineral: |
Ferrihydrite |
Reference: |
SBLVD14 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
Ca<2+>
- calcium
|
Site Type: |
»Fe-OH |
Equation: |
4 »Fe-OH + Ca<2+> + H2O ⇔ (»Fe-OH)2-(»Fe-O)2-Ca(OH)<1-> + 3 H<1+> |
LogK: |
-16.0 LogK°I=0 (Conversion to I = 0): -15.89
LogK2.31 nm−2 (SSD-normalized): 1.31
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaClO4
|
Solid/Liquid Ratio: |
10.0 g/L |
pH Range: |
4-11 |
Fit Method: |
PHREEQC |
Comment: |
To model the effect of Ca2+ competition, complexes and equations used by Sverjensky (2006) for sorption of Ca2+ to goethite were used, although the equilibrium constants had to be adapted to obtain the best fit for ferrihydrite
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