RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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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+> + CO3<2->  ⇔  »Fe(w)-O-UO2CO3<1-> + H<1+>
LogK: 9.014         LogK2.31 nm−2 (SSD-normalized):   10.74
Experiment: Literature
Ionic Strength: NaNO3
Temperature: 298.15 K
pH Range: <6.33
Ligand Concentration Range: 1E-4; 1E-5; 1E-6; 8.4E-6; 4.2E-6 mol/L
Fit Method: UCODE_2005
Comment: refitted data from [WDPWX94], [P99], [MST95], [WKM03] and [FDZ06]; 10 data sets; source of thermodynamic data: WATEQ4F; mostly open systems with 1E-3.5 atm CO2 (g); re-estimation of constants by coupling the geochemical computer code PHREEQC with UCODE_2005 (automated parameter optimization program); S/L ratio: 0.0089 g/L to 1.78 g/L
 
1 data sets were retrieved