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+> + 2 CO3<2->  ⇔  »Fe(w)-O-UO2(CO3)2<3-> + H<1+>
LogK: 15.28        LogK°I=0 (Conversion to I = 0):   16.46         LogK2.31 nm−2 (SSD-normalized):   17.01
Experiment: Literature
Ionic Strength: 0.1 mol/L NaNO3
Temperature: 298.15 K
Ligand Concentration Range: 1E-4; 1E-5; 1E-6 mol/L
Fit Method: UCODE_2005
Comment: refitted data from [WDPWX94], [P99], [MST95], [WKM03], [HL85] and [H81]; 12 data sets; source of thermodynamic data: NEA database; re-estimation of constants by coupling the geochemical computer code PHREEQC with UCODE_2005 (automated parameter optimization program); S/L ratio: 0.089 g/L to 1.78 g/L
 
1 data sets were retrieved