RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Binding Site Data:


Mineral: Goethite
Reference: LE94
SCM Type: CC - Constant Capacitance   (C1: 0.8 F/m2)
Ionic Strength: 0.1 mol/L of NaCl
Site Type: »Fe-OH
PZC: 9.08
pK1: 7.523 pK1°I=0 (Conversion to I = 0): 7.42 pK12.31 nm−2 (normalized): 7.60
pK2: 10.63 pK2°I=0 (Conversion to I = 0): 10.52 pK22.31 nm−2 (normalized): 10.56
Site Density in nm-2: 2.7400
Original Site Density: 2.74 sites / nm² surface
Solid/Liquid Ratio in g/L: 3.612
pH Range: 5-10
Temperature in K: 298.15
Method for Site Density: Potentiometric Titration
Method for Protolysis:Potentiometric Titration
Fit Method:FITEQL
Comment: reported values are for I=0.001 M, other ionic strengths were 0.01 and 0.1 M; optimum PZNPC in the range 9.05 to 9.10; cited in [S03], good fit with Vy=0.81; temperature 25+-0.2°C
 
1 data sets were retrieved