RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: MCJ09
SCM Type: DDL - Diffuse Double Layer
Ligand: UO2<2+> - uranyl(VI)
Site Type: »Fe(w)-OH
Equation: »Fe(w)-OH + UO2<2+> + H2O  ⇔  »Fe(w)-O-UO2(OH) + 2 H<1+>
LogK: -5.111        LogK°I=0 (Conversion to I = 0):   -4.90         LogK2.31 nm−2 (SSD-normalized):   -3.38
Experiment: Literature
Ionic Strength: 0.1 mol/L NaNO3
Temperature: 298.15 K
Ligand Concentration Range: 1E-5 mol/L
Fit Method: UCODE_2005
Comment: refitted data of [H81] and [HL85]; 2 data sets; source of thermodynamic data: WATEQ4F; S/L ratio was 1 g/L and 0.15 g/L; no carbonate; re-estimation of constants by coupling the geochemical computer code PHREEQC with UCODE_2005 (automated parameter optimization program)
 
1 data sets were retrieved