RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Site Query Results


Binding Site Data:

Mineral: Alumina
Reference: JFLFH18
SCM Type: CDM - (CD-)MUSIC ,  C2: 5.0 F/m2
Ionic Strength: 0.0 mol/L of NaCl
Site Type: >Al(singly)OH<0.5->
PZC:
pK1: 9.3 pK1°I=0 (Conversion to I = 0): 9.30 pK12.31 nm−2 (normalized): 9.78
pK2: pK2°I=0 (Conversion to I = 0):  
Site Density in nm-2: 7.0000
Original Site Density: 7.0 sites / nm² surface
Solid/Liquid Ratio in g/L: 30.0
pH Range: 5-9,5
Temperature in K: 298.15
Method for Site Density: Literature
Method for Protolysis:Potentiometric Titration
Fit Method:FITEQL
Comment:

A total site density of 6.6 sites nm−2 (2.5 for each normal site and 0.8 for each subsurface site) was used by Hiemstra et al. A surface site density of 7 sites nm−2, close to the total surface site density used by Hiemstra et al., was chosen in this study.

Potentiometric titrations (pH range 5 to 9.5) were performed at 25 °C at different ionic strengths of NaCl (0.1, 0.05 and 0.01 mol L−1) with a Metrohm 736 GP Titrino titrator, at a mass to volume ratio of 30 g L−1 under Ar atmosphere.

≡AlOH0.5− + H+ ↔ ≡AlOH20.5+   log K° = 9.3

 
1 data sets were retrieved