RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Site Query Results

Binding Site Data:

Mineral:	amorphous Silica
Reference:	BB01
SCM Type:	TL - Triple Layer
Ionic Strength:	0.1 mol/L of KNO3
Site Type:	»Si-OH
PZC:	4.8
pK1:	-2.2	pK1°_I=0 (Conversion to I = 0):	-2.31	pK1_{2.31 nm⁻²} (normalized):	-2.56
pK2:	7.6	pK2°_I=0 (Conversion to I = 0):	7.49	pK2_{2.31 nm⁻²} (normalized):	7.96
Site Density in nm^-2:	1.0000
Original Site Density:	1.0 sites / nm² surface
Solid/Liquid Ratio in g/L:	0.0
pH Range:
Temperature in K:
Method for Site Density:
Method for Protolysis:	Potentiometric Titration
Fit Method:
Comment:	isoelectric point 3.8+-0.3; SSD=1-1.2 groups/nm^2; without taking into account ion pair formation between surface and background electrolyte (logK=0): pK1=2.1+-0.1, good fitting with reasonable initial values of [>>SiOH]=0.008-0.01 mol/L

1 data sets were retrieved