RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: SIT21
SCM Type: NE - Non-electrostatic
Ligand: Ca<2+> - calcium
Site Type: »X(w2)-OH
Equation: »X(w2)-OH + Ca<2+>  ⇔  »X(w2)-O-Ca<1+> + H<1+>
LogK: -6.0        LogK°I=0 (Conversion to I = 0):   -6.00
Experiment: Batch Sorption Experiments
Ionic Strength: 0.0 mol/L
pH Range: 4.9 - 12.7
Ligand Concentration Range: 9.8E-5; 2.1E-4 mol/L
Fit Method: PHREEQC
Comment: S/L ratio: 34, 42, 85, 342 g/L;

cation exchange and surface complexation combined
(2XNa + Ca2+ = X2Ca + 2Na+ with log K = 0.65 (I ≤ 0.1 M), log K = 1.1 (I = 0.5 M);
XNa + CaOH+ = XCaOH + Na+ with log K = 2.5 (I ≤ 0.1 M), log K = 2.8 (I = 0.5 M))
 
1 data sets were retrieved