RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: BB05a
SCM Type: NE - Non-electrostatic
Ligand: PaO2<1+> - protactinyl(V)
Site Type: »X(s)-OH
Equation: »X(s)-OH + Pa<5+> + 4 H2O  ⇔  »X(s)-O-Pa(OH)4 + 5 H<1+>
LogK: 4.0        LogK°I=0 (Conversion to I = 0):   3.57
Experiment: Sorption Isotherms
Ionic Strength: 0.1 mol/L NaClO4
Fit Method: MINSORB
Comment: a priori prediction of the adsorption behavior using a linear-free-energy-relationship (LFER) logK=(8.1+-0.3)+(0.90+-0.02)logK(-4.5) (hydrolysis constant); R=0.99; logK = -4.5 for the aqueous species PaO2OH; surface complex given as =SOPaO2
 
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