RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Site Query Results

Binding Site Data:

Mineral:	Goethite
Reference:	FTONS95
SCM Type:	CC - Constant Capacitance (C₁: 1.0 F/m²)
Ionic Strength:	0.1 mol/L of NaNO3
Site Type:	»Fe-OH
PZC:	5.9
pK1:	5.28	pK1°_I=0 (Conversion to I = 0):	5.17	pK1_{2.31 nm⁻²} (normalized):	4.45
pK2:	6.66	pK2°_I=0 (Conversion to I = 0):	6.55	pK2_{2.31 nm⁻²} (normalized):	7.49
Site Density in nm^-2:	0.3408
Original Site Density:	0.566 µmol / m² surface
Solid/Liquid Ratio in g/L:	25.0
pH Range:	4-8
Temperature in K:	298.15
Method for Site Density:	Mean of Different Sources
Method for Protolysis:	Potentiometric Titration
Fit Method:	FITEQL
Comment:	value for PZC is relatively low; may be caused by slow removal of carbonate surface complex(es) from goethite (needs about 2 months)

1 data sets were retrieved