RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: CK18
SCM Type: NE - Non-electrostatic
Ligand: Ra<2+> - radium
Site Type: »X(w)-OH
Equation: »X(w)-OH + Ra<2+>  ⇔  »X(w)-O-Ra<1+> + H<1+>
LogK: -2.1        LogK°I=0 (Conversion to I = 0):   -1.97
Experiment: Sorption Isotherms
Ionic Strength: 0.01 mol/L NaCl
Solid/Liquid Ratio: 0.3 g/L
pH Range: 3, 5, 7 or 9 ± 0.05
Fit Method: PHREEQC
Comment: 3-320 Bq of 226Ra stock; also ion exchange reaction given: 2»X-Na + Ra<2+> = »X2-Ra + 2Na<1+> log K = 0.2
 
1 data sets were retrieved