RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: HVRU09
SCM Type: CDM - (CD-)MUSIC
Ligand: UO2<2+> - uranyl(VI)
Site Type: »Fe-singly
Equation: 2 »Fe-OH<0.5-> + UO2<2+> + CO3<2-> + H2O  ⇔  (»Fe-OH)2-UO2CO3(OH) + H<1+>
LogK: 10.49 ± 0.07         LogK2.31 nm−2 (SSD-normalized):   10.64
Experiment: Batch Sorption Experiments
Ionic Strength: NaNO3
Temperature: 298.15 K
pH Range: 3-10
Fit Method: ECOSAT
Comment: closed systems; singly-coordinated group »Fe-OH(e) is able to form complexes by edge sharing; combined data set of [HL85] and [MST95] is used; the OH ligand of this species may protonate resulting in »(FeOH)2UO2CO3, if included in the data description, logK = 16.6+-0.7; an alternativ ternary uranyl mono-carbonato surface species is »(FeO(c))2CO-UO2(OH)3
 
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