| Mineral: |
Ferrihydrite |
| Reference: |
GDB09 |
| SCM Type: |
CDM - (CD-)MUSIC
(C1: 1.0 F/m2, C2: 0.74 F/m2) |
| Ionic Strength: |
0.01 mol/L of
NaNO3
|
| Site Type: |
»Fe(s)-OH |
| PZC: |
|
| pK1: |
8.1 |
pK1°I=0 (Conversion to I = 0): |
8.06 |
pK12.31 nm−2 (normalized): |
8.54 |
| pK2: |
|
pK2°I=0 (Conversion to I = 0): |
|
|
| Site Density in nm-2: |
6.3000 |
| Original Site Density: |
6.3 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
|
| Temperature in K: |
298.15 |
| Method for Site Density: |
Literature |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | MINTEQ |
| Comment: |
SSA from [G01c]; refitted pK value from [DM90]; FeOH2<0.5+> = FeOH<0.5-> + H<1+>; Stern layer capacitances assumed to be equal to those of goethite [HV06]; in some cases the author applied the strong/weak concept to singly sites |
| |
| Mineral: |
Ferrihydrite |
| Reference: |
GDB09 |
| SCM Type: |
CDM - (CD-)MUSIC
(C1: 1.0 F/m2, C2: 0.74 F/m2) |
| Ionic Strength: |
0.01 mol/L of
NaNO3
|
| Site Type: |
»Fe-singly |
| PZC: |
|
| pK1: |
8.1 |
pK1°I=0 (Conversion to I = 0): |
8.06 |
pK12.31 nm−2 (normalized): |
8.54 |
| pK2: |
|
pK2°I=0 (Conversion to I = 0): |
|
|
| Site Density in nm-2: |
6.3000 |
| Original Site Density: |
6.3 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
|
| Temperature in K: |
298.15 |
| Method for Site Density: |
Literature |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | MINTEQ |
| Comment: |
SSA from [G01c]; refitted pK value from [DM90]; FeOH2<0.5+> = FeOH<0.5-> + H<1+>; Stern layer capacitances assumed to be equal to those of goethite [HV06]; in some cases the author applied the strong/weak concept to singly sites |
| |
| Mineral: |
Ferrihydrite |
| Reference: |
GDB09 |
| SCM Type: |
CDM - (CD-)MUSIC
(C1: 1.0 F/m2, C2: 0.74 F/m2) |
| Ionic Strength: |
0.01 mol/L of
NaNO3
|
| Site Type: |
»Fe(w)-OH |
| PZC: |
|
| pK1: |
8.1 |
pK1°I=0 (Conversion to I = 0): |
8.06 |
pK12.31 nm−2 (normalized): |
8.54 |
| pK2: |
|
pK2°I=0 (Conversion to I = 0): |
|
|
| Site Density in nm-2: |
6.3000 |
| Original Site Density: |
6.3 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
|
| Temperature in K: |
298.15 |
| Method for Site Density: |
Literature |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | MINTEQ |
| Comment: |
SSA from [G01c]; refitted pK value from [DM90]; FeOH2<0.5+> = FeOH<0.5-> + H<1+>; Stern layer capacitances assumed to be equal to those of goethite [HV06]; in some cases the author applied the strong/weak concept to singly sites |
| |
