RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Site Query Results


Binding Site Data:

Mineral: Ferrihydrite
Reference: DCE02
SCM Type: DDL - Diffuse Double Layer
Ionic Strength: 0.0 mol/L of NaNO3
Site Type: »Fe-OH
PZC:
pK1: 7.29 pK1°I=0 (Conversion to I = 0): 7.29 pK12.31 nm−2 (normalized): 6.34
pK2: 8.93 pK2°I=0 (Conversion to I = 0): 8.93 pK22.31 nm−2 (normalized): 9.88
Site Density in nm-2: 0.2611
Original Site Density: 0.25 mol / mol metal
Solid/Liquid Ratio in g/L:
pH Range: 5-9,5
Temperature in K: 298.15
Method for Site Density: Best Estimate
Method for Protolysis:Literature
Fit Method:MS Excel
Comment:

Note: optimized site density = 0.25 mol/mol Fe; optimized surface area = 6.49E+03 m2/g.

≡FeOH2+ → ≡FeOH + H+   Ka = 5.13E-08
≡FeOH → ≡FeO− + H+   Ka = 1.17E-09 Protolysis data taken from [DM90]

 
1 data sets were retrieved