Mineral: |
Goethite |
Reference: |
KYFGD10 |
SCM Type: |
ETL - Extended Triple Layer |
Ligand: |
AsO4<3->
- arsenate
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + AsO4<3-> + H<1+> ⇔ »Fe-O-AsO3<2-> + H2O |
LogK: |
25.79
LogK2.31 nm−2 (SSD-normalized): 26.73
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
NaNO3
|
Temperature: |
293.15 K |
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
3 - 11 |
Ligand Concentration Range: |
6.4E-4; 3.01E-4; 1.82E-4 mol/L |
Fit Method: |
GEOSURF |
Comment: |
extended TLM; hypothetical 1.0 M standard states; original equation: »Fe-OH + H3AsO4 = »Fe-O-AsO3<2-> + 2H<1+> + H2O with log K = 4.7, formation constant in aqueous solution: AsO4<3-> + 3H<1+> = H3AsO4 logK = 21.09 [Welch, Stollenwerk 2003]; 0.001, 0.01, 0.1 M NaNO3 |
|