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+> + SO4<2-> ⇔ »Fe(w)-OH-PbSO4
LogK:	9.48 LogK°_I=0 (Conversion to I = 0): 9.48 LogK_{2.31 nm⁻²} (SSD-normalized): 11.21
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.0 mol/L
Temperature:	298.15 K
pH Range:	3 - 5
Fit Method:	FITEQL
Comment:	3-site model (third higher affinity site); Pb conc. of 9.66 µmol/kg, Fe concentration of 5.0 mmol/kg, SO4 concentration of 4.17 mmol/kg; no convergence of logK₂^TC so it was fixed at this value to achieve consistency between results

1 data sets were retrieved