Mineral: |
Ferrihydrite |
Reference: |
SW99 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
AsO4<3->
- arsenate
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + AsO4<3-> + 3 H<1+> ⇔ »Fe-H2-AsO4 + H2O |
LogK: |
32.3 LogK°I=0 (Conversion to I = 0): 32.30
LogK2.31 nm−2 (SSD-normalized): 34.29
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.0 mol/L
|
Temperature: |
298.15 K |
pH Range: |
3.5-12 |
Fit Method: |
FITEQL |
Comment: |
original equation in the article: »FeOH + H3AsO4 <=> »Fe-H2-AsO4 + H2O with logK = 11.7 (at As(T)/Fe = 0.214), pKa-values for H3AsO4 were 2.24, 6.76 and 11.6 (Allison et al. 1991, see article) |
|