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: Pb<2+> - lead
Site Type: »X-OH
Equation: »X-OH + Pb<2+>  ⇔  »X-O-Pb<1+> + H<1+>
LogK: -3.07 ± 0.36         LogK°I=0 (Conversion to I = 0):   -3.07         LogK2.31 nm−2 (SSD-normalized):   0.58
Experiment: Potentiometric Titration
Ionic Strength: 0.0 mol/L NaNO3
Temperature: 298.15 K
Solid/Liquid Ratio: 1.0 g/L
pH Range: 4-8
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 + Pb2+ = =X2Pb + 2Na+ logK=10.83+-0.20; at low pH competition with protons is very important
 
1 data sets were retrieved