| Mineral: |
Ferrihydrite |
| Reference: |
GTEK11 |
| 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(s1)-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: |
|
| Method for Site Density: |
Literature |
| Method for Protolysis: | Literature |
| Fit Method: | MINTEQ |
| Comment: |
singly coordinated »Fe-OH groups; »Fe(s1)-OH is a very strong affinity site (0.1 % of the total number of sites); »Fe(s2)-OH (0.9 % of the total number of sites); SSA from [G01c]; SSD (also in [GDB09]) was optimized on the basis of published data sets on surface charging on ferrihydrite; pK value from [DM90]; Stern layer capacitances assumed to be equal to those of goethite [HV06] |
| |
| Mineral: |
Ferrihydrite |
| Reference: |
GTEK11 |
| 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(s2)-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: |
|
| Method for Site Density: |
Literature |
| Method for Protolysis: | Literature |
| Fit Method: | MINTEQ |
| Comment: |
singly coordinated »Fe-OH groups; »Fe(s1)-OH is a very strong affinity site (0.1 % of the total number of sites); »Fe(s2)-OH (0.9 % of the total number of sites); SSA from [G01c]; SSD (also in [GDB09]) was optimized on the basis of published data sets on surface charging on ferrihydrite; pK value from [DM90]; Stern layer capacitances assumed to be equal to those of goethite [HV06] |
| |
| Mineral: |
Ferrihydrite |
| Reference: |
GTEK11 |
| 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: |
|
| Method for Site Density: |
Literature |
| Method for Protolysis: | Literature |
| Fit Method: | MINTEQ |
| Comment: |
singly coordinated »Fe-OH groups; »Fe(s1)-OH is a very strong affinity site (0.1 % of the total number of sites); »Fe(s2)-OH (0.9 % of the total number of sites); SSA from [G01c]; SSD (also in [GDB09]) was optimized on the basis of published data sets on surface charging on ferrihydrite; pK value from [DM90]; Stern layer capacitances assumed to be equal to those of goethite [HV06] |
| |
