Mineral: |
Goethite |
Reference: |
GM01 |
SCM Type: |
CC - Constant Capacitance |
Ligand: |
PO4<3->
- phosphate
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + PO4<3-> + 2 H<1+> ⇔ »Fe-PO4H<1-> + H2O |
LogK: |
25.86 ± 0.06
LogK2.31 nm−2 (SSD-normalized): 26.80
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.7 mol/L
NaCl
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
0.234 g/L |
pH Range: |
3-10 |
Ligand Concentration Range: |
2.3E-5 mol/L |
Fit Method: |
FITEQL |
Comment: |
error interval corresponds to 95% confidence level; original reaction equation in the study: »Fe-OH + H2PO4<1-> = »Fe-PO4H<1-> + H2O with logK = 7.83; formation constant in aqueous solution (25°C, 0.7M NaCl): H2PO4<2-> = 2 H<1+> + PO4<3-> logK = -18.03; not considering Na-As ion pairs |
|