RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: CZR91
SCM Type: TL - Triple Layer
Ligand: Cd<2+> - cadmium
Site Type: »Fe-OH
Equation: »Fe-OH + Cd<2+> + H2O  ⇔  »Fe-O-Cd(OH) + 2 H<1+>
LogK: -10.7 ± 0.04         LogK°I=0 (Conversion to I = 0):   -10.49         LogK2.31 nm−2 (SSD-normalized):   -9.76
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaNO3
Temperature: 298.15 K
Solid/Liquid Ratio: 0.15 g/L
pH Range: 5-8.5
Ligand Concentration Range: 1E-6 mol/L
Fit Method: FITEQL
Comment: data were modeled assuming the formation of only outer-sphere complexes; log K depends on initial Cd sorption! -> reflects the heterogeneity of the surface? log K = -10.7 for 1E-6 M Cd and -10.4 for 1E-7M Cd; 0.87 mM Fe = 0.15 g/L Fe2O3*H2O
 
1 data sets were retrieved