RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Alumina
Reference: MDCF94
SCM Type: CC - Constant Capacitance
Ligand: Yb<3+> - ytterbium
Site Type: »Al-OH
Equation: »Al-OH + Yb<3+> + H2O  ⇔  »Al-O-Yb(OH)<1+> + 2 H<1+>
LogK: -6.39 ± 0.08         LogK°I=0 (Conversion to I = 0):   -5.64         LogK2.31 nm−2 (SSD-normalized):   -7.78
Experiment: Potentiometric Titration
Ionic Strength: 0.1 mol/L NaNO3
Solid/Liquid Ratio: 0.2 g/L
pH Range: 5-7
Ligand Concentration Range: 2E-5 mol/L
Fit Method: FITEQL
Comment: loading ratio [Yb3+]/[SOH]=0.26=0.2 g/L, log K for 7d experiments, cited in [MDF97]; more values for other contact time (-7.8 for 3d, -6.6 for 12d, with error 0.2); error 2 sigma
 
1 data sets were retrieved