RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Maghemite
Reference: JGF10
SCM Type: CC - Constant Capacitance
Ligand: Si(OH)4<0> - Silicic acid
Site Type: »Fe-OH
Equation: »Fe-OH + Si(OH)4<0>  ⇔  »Fe-O-Si(OH)3 + H2O
LogK: 3.61 ± 0.01         LogK°I=0 (Conversion to I = 0):   3.61         LogK2.31 nm−2 (SSD-normalized):   4.55
Experiment: Potentiometric Titration
Ionic Strength: 0.1 mol/L
Temperature: 298.15 K
Solid/Liquid Ratio: 1.0 g/L
pH Range: 2.8 - 11.1
Fit Method: FITEQL
Comment: Three different ratios, 1:1 (1.25 × 10-3 mol dm-3), 2:1, and 3:1 between S0 and the total concentrations of added silicate, [»FeOH]:[Si(OH)4], were studied and included in the model calculations.
 
1 data sets were retrieved