RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: SFBMB22
SCM Type: NE - Non-electrostatic
Ligand: UO2<2+> - uranyl(VI)
Site Type: »X(s)-OH
Equation: »X(s)-OH + UO2<2+> + 3 H2O  ⇔  »X(s)-O-UO2(OH)3<2-> + 4 H<1+>
LogK: -20.5 ± 0.4         LogK°I=0 (Conversion to I = 0):   -20.50
Experiment: Batch Sorption Experiments
Ionic Strength: 0.0 mol/L
Temperature: 296.15 K
Solid/Liquid Ratio: 4.0 g/L
pH Range: 4 - 10
Ligand Concentration Range: 1E-6 mol/L
Fit Method: PHREEQC
Comment: Fit Method: PHREEQC coupled with UCODE 2014;

cation exchange reactions [BB97b]:
2Na+-clay + Ca2+ = Ca2+-clay + 2Na+, log K = 0.61;
2Na+-clay + UO22+ = UO22+-clay + 2Na+, log K = 0.15
 
1 data sets were retrieved