Mineral: |
Ferrihydrite |
Reference: |
MBK00 |
SCM Type: |
TL - Triple Layer |
Ligand: |
AsO4<3->
- arsenate
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + AsO4<3-> + H<1+> ⇔ »Fe-AsO4<2-> + H2O |
LogK: |
21.2 LogK°I=0 (Conversion to I = 0): 21.99
LogK2.31 nm−2 (SSD-normalized): 22.14
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.04 mol/L
KNO3
|
Fit Method: |
Comment: |
log K for background cation from [D78] assuming K+ behaves like Na+; best-fit constants determined with the model simulations of the experimental data; original reaction equation in the study: »Fe-OH +H3 AsO4 = »Fe-AsO4<2-> + H2O + 2H<1+> with logK = 0.6, formation constant in aqueous solution: H3AsO4 = AsO4<3-> + 3H<1+> with logK = -20.6 (DA88] |
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