RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Goethite
Reference: S79
SCM Type: CC - Constant Capacitance
Ligand: Si(OH)4<0> - Silicic acid
Site Type: »Fe-OH
Equation: »Fe-OH + Si(OH)4<0>  ⇔  »Fe-H2SiO4<1-> + H<1+> + H2O
LogK: -3.3        LogK°I=0 (Conversion to I = 0):   -3.41         LogK2.31 nm−2 (SSD-normalized):   1.97
Experiment: Potentiometric Titration
Ionic Strength: 0.1 mol/L NaClO4
Temperature: 295.15 K
Solid/Liquid Ratio: 6.0 g/L
pH Range: 3-10
Ligand Concentration Range: 2E-4. 4E-4. 8E-4 mol/L
Fit Method: graphic extrapolation
Comment: cited in [SKS80], [SS87] and [SS80], SCM named \"ligand exchange model\", dependece on charge e^(F psi/R T)
 
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