Mineral: |
Goethite |
Reference: |
MG96b |
SCM Type: |
CC - Constant Capacitance |
Ligand: |
AsO4<3->
- arsenate
|
Site Type: |
»Fe-(OH)2 |
Equation: |
»Fe-(OH)2 + AsO4<3-> + 2 H<1+> ⇔ »Fe-AsO4<1-> + 2 H2O |
LogK: |
23.52 LogK°I=0 (Conversion to I = 0): 24.70
LogK2.31 nm−2 (SSD-normalized): 27.90
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaCl
|
Temperature: |
296.15 K |
Solid/Liquid Ratio: |
2.5 g/L |
pH Range: |
2.5-11 |
Ligand Concentration Range: |
2.66E-4 mol/L |
Fit Method: |
FITEQL |
Comment: |
two-site approach (monodentate and bidentate); original reaction equation in the study: »Fe-(OH)2 + H3AsO4 = »Fe-AsO4<1-> + 2 H2O + H<1+> with logK = 2.9, formation constant in aqueous solution: AsO4<3-> + 3 H<+> = H3AsO4<0> logK = 20.62 [GFFGN03] |
|