Mineral: |
Magnetite |
Reference: |
BFMR84 |
SCM Type: |
TL - Triple Layer |
Ligand: |
NO3<1->
- nitrate
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + NO3<1-> + H<1+> ⇔ »Fe-OH2-NO3 |
LogK: |
5.84 LogK°I=0 (Conversion to I = 0): 5.87
LogK2.31 nm−2 (SSD-normalized):
|
Experiment: |
Potentiometric Titration |
Ionic Strength: |
0.001 mol/L
KNO3
|
Temperature: |
323.15 K |
Solid/Liquid Ratio: |
20.0 g/L |
pH Range: |
4-9 |
Ligand Concentration Range: |
0.001-0.1 mol/L |
Fit Method: |
graphic extrapolation |
Comment: |
defined as double layer but really triple layer calulation with Kint anion from equation 17 and pK1 for anion: »Fe-OH2<1+>+A<1->=»Fe-O-H2-A logK=1.68 »Fe-OH2<1+>=»Fe-OH+H<1+> pK1=4.15 = -logK equ. invers logK=4.15 sum equ »Fe-OH+NO3<1->+H<1+>=»Fe-OH2-NO3 logK=1.68+4.15=5.83 |
|