RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Binding Site Data:

Mineral: Hematite
Reference: LCV99
SCM Type: CC - Constant Capacitance   (C1: 1.98 F/m2)
Ionic Strength: 0.1 mol/L of NaNO3
Site Type: »Fe-OH
PZC: 8.48
pK1: 8.08 pK1°I=0 (Conversion to I = 0): 7.97 pK12.31 nm−2 (normalized): 8.03
pK2: 8.82 pK2°I=0 (Conversion to I = 0): 8.71 pK22.31 nm−2 (normalized): 8.87
Site Density in nm-2: 2.0700
Original Site Density: 2.07 sites / nm² surface
Solid/Liquid Ratio in g/L: 0.53
pH Range: 4-9
Temperature in K: 298.15
Method for Site Density: Potentiometric Titration
Method for Protolysis:Potentiometric Titration
Fit Method:GRFIT
Comment: PZC=PZNPC; surface site concentration 2E-4 mol/L (assumption that each surface hydroxyl can bind one proton, asymptotic surface charge at pH<=4); Ar atmosphere; temperature 25+-0.3°C
 
1 data sets were retrieved