Mineral: |
Goethite |
Reference: |
KYFGD10 |
SCM Type: |
ETL - Extended Triple Layer |
Ligand: |
AsO4<3->
- arsenate
|
Site Type: |
»Fe-OH |
Equation: |
2 »Fe-OH + AsO4<3-> + 2 H<1+> ⇔ (»Fe-O)2-AsO2<1-> + 2 H2O |
LogK: |
23.99
LogK2.31 nm−2 (SSD-normalized): 25.86
|
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: |
6.40E-4; 3.01E-4; 1.82E-4 mol/L |
Fit Method: |
GEOSURF |
Comment: |
extended TLM; site-occupancy standard states; original equation: 2»Fe-OH + H3AsO4 = (»Fe-O)2-AsO2<1-> + H<1+> + 2H2O with log K = 2.9, formation constant in aqueous solution: AsO4<3-> + 3H<1+> = H3AsO4 logK = 21.09 [Welch, Stollenwerk 2003]; 0.001, 0.01, 0.1 M NaNO3 |
|