RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Quartz
Reference: DK01
SCM Type: NE - Non-electrostatic
Ligand: UO2<2+> - uranyl(VI)
Site Type: »Si(w)-OH
Equation: »Si(w)-OH + UO2<2+> + H2O  ⇔  »Si(w)-O-UO2(OH) + 2 H<1+>
LogK: -5.28        LogK°I=0 (Conversion to I = 0):   -5.28         LogK2.31 nm−2 (SSD-normalized):   1.27
Experiment: Batch Sorption Experiments
Ionic Strength: 0.0 mol/L NaNO3
pH Range: <6
Fit Method: FITEQL
Comment: apparent stability constant for I=0, for conversion to other ionic strengths, activity constants of all surface species are assumed equal to one; no electrical double layer correction to the mass laws for charged surface species; fit with U(VI) adsorption data [KD01] over the entire pH range and the thermodynamic set in table 2-1 of [DKP01]; termed model B4; fit for pH<6: log K=-5,23 and thermodynamic set of (KCKD96) (without formation of ternary surface complex, termed model B2) cited in [K02b]
 
1 data sets were retrieved