RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Goethite
Reference: SPH08
SCM Type: 1pK-BS - 1pK-Basic Stern
Ligand: UO2<2+> - uranyl(VI)
Site Type: »Fe-singly
Equation: 2 »Fe-OH<0.5-> + UO2<2+>  ⇔  (»Fe-OH)2-UO2<1+>
LogK: 13.45        LogK°I=0 (Conversion to I = 0):   13.88         LogK2.31 nm−2 (SSD-normalized):   13.60
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaNO3
Temperature: 298.15 K
Solid/Liquid Ratio: 0.09 g/L
pH Range: 3-10
Ligand Concentration Range: 1E-6 mol/L
Fit Method: EQLFOR
Comment: maximum surface loading 0.26 wt% U; assumption that UO2<2+> only forms complexes with the »Fe-OH<0.5-> surface sites on the {101} surface and the »Fe-O<0.5-> surface sites on {101} do not form complexes with UO2<2+>
 
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