RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: SWM03
SCM Type: DDL - Diffuse Double Layer
Ligand: Pb<2+> - lead
Site Type: »Fe(w)-OH
Equation: »Fe(w)-OH + Pb<2+>  ⇔  »Fe(w)-O-Pb<1+> + H<1+>
LogK: 1.99        LogK°I=0 (Conversion to I = 0):   1.99         LogK2.31 nm−2 (SSD-normalized):   3.72
Experiment: Sorption Isotherms
Ionic Strength: 0.0 mol/L
Temperature: 298.15 K
pH Range: 3.57 - 3.60
Fit Method: FITEQL
Comment: 3-site model (third higher affinity site); Pb conc. of 1.21 - 47.4 µmol/kg, Fe concentration of 1.57 mmol/kg; Isotherm C; no convergence of this value so it was fixed to achieve consistency between results
 
1 data sets were retrieved