RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: BDP00
SCM Type: DDL - Diffuse Double Layer
Ligand: Cd<2+> - cadmium
Site Type: »X-OH
Equation: »X-OH + Cd<2+>  ⇔  »X-O-Cd<1+> + H<1+>
LogK: -4.69 ± 0.42         LogK°I=0 (Conversion to I = 0):   -4.69         LogK2.31 nm−2 (SSD-normalized):   -0.57
Experiment: Potentiometric Titration
Ionic Strength: 0.0 mol/L NaNO3
Temperature: 298.15 K
Solid/Liquid Ratio: 1.0 g/L
pH Range: 4-10
Ligand Concentration Range: 1E-4. 2E-4. 4E-4 mol/L
Fit Method: FITEQL
Comment: combined with cation exchange: main sorption phenomena ion exchange 2=XNa + Cd2+ = =X2Cd + 2Na+ logK=5.25+-0.16; at low pH competition with protons is very important
 
1 data sets were retrieved