Mineral: |
Ferrihydrite |
Reference: |
DM90 |
SCM Type: |
DDL - Diffuse Double Layer
|
Ionic Strength: |
0.0 mol/L of
|
Site Type: |
»Fe(s)-OH |
PZC: |
8.0 |
pK1: |
7.29 |
pK1°I=0 (Conversion to I = 0): |
7.29 |
pK12.31 nm−2 (normalized): |
5.68 |
pK2: |
8.93 |
pK2°I=0 (Conversion to I = 0): |
8.93 |
pK22.31 nm−2 (normalized): |
10.54 |
Site Density in nm-2: |
0.0565 |
Original Site Density: |
0.005 mol / mol metal
|
Solid/Liquid Ratio in g/L: |
|
pH Range: |
|
Temperature in K: |
298.15 |
Method for Site Density: |
Mean of Different Sources |
Method for Protolysis: | Mean of Different Sources |
Fit Method: | graphic extrapolation |
Comment: |
pK weighted averages of literature titration data, confidence level 95%; SSD: p. 92-93, original values in mol/mol Fe (in Fe2O3*H2O); pK: p. 101 3rd site type required for anion sorption (there is no distinction between strong and weak sites!); PZC in the range 7.9-8.2 with an average value of 8.0 |
|