Mineral: |
Ferrihydrite |
Reference: |
JD08 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
AsO3<3->
- arsenite
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + AsO3<3-> + 4 H<1+> ⇔ »Fe-H3AsO3<1+> + H2O |
LogK: |
45.54 LogK°I=0 (Conversion to I = 0): 46.19
LogK2.31 nm−2 (SSD-normalized): 47.53
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.013 mol/L
NaCl
|
Solid/Liquid Ratio: |
0.089 g/L |
pH Range: |
2 - 12 |
Ligand Concentration Range: |
1.2E-4; 3.6E-4 mol/L |
Fit Method: |
MINTEQ |
Comment: |
1mM HFO as Fe(III)(89 g HFO/mol Fe); mode of experiment: single & coadsorbate; original equation: »Fe-OH + H3AsO3 + H<1+> = »Fe-H3AsO3<1+> + H2O with log K = 10.8, formation constant in aqueous solution: AsO3<3-> + 3H<1+> = H3AsO3 logK = 34.74 [DH03] |
|