RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Gibbsite
Reference: MZST95
SCM Type: TL - Triple Layer
Ligand: UO2<2+> - uranyl(VI)
Site Type: »Al-OH
Equation: »Al-OH + 3 UO2<2+> + 5 H2O  ⇔  »Al-O-(UO2)3(OH)5 + 6 H<1+>
LogK: -31.35         LogK2.31 nm−2 (SSD-normalized):   -29.44
Experiment: Batch Sorption Experiments
Ionic Strength: NaCl
Temperature: 298.15 K
Solid/Liquid Ratio: 5.74 g/L
pH Range: 4-9
Fit Method: FITEQL
Comment: ionic strengths: 0.001, 0.01 and 0.1 M; second solid/liquid ratio:0.55g/L; original equation in the study: »Al-OH + (UO2)3(OH)5<1+> = »Al-O-(UO2)3(OH)5 + H<1+> with logK = -15.8; formation constant in aqueous solution for 3UO2<2+> + 5H2O = (UO2)3(OH)5<1+> + 5H<1+>, logK = -15.55 (Grenthe 1992)
 
1 data sets were retrieved