RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: BB97b
SCM Type: NE - Non-electrostatic
Ligand: Ni<2+> - nickel
Site Type: »X(s)-OH
Equation: »X(s)-OH + Ni<2+>  ⇔  »X(s)-O-Ni<1+> + H<1+>
LogK: -0.1 ± 0.15         LogK°I=0 (Conversion to I = 0):   0.22
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaClO4
Solid/Liquid Ratio: 1.1 g/L
pH Range: 3-10.5
Fit Method: MINSORB
Comment: Na-montmorillonite, MINSORB code (2-site protolysis no electrostatics surface complexation and cation exchange model developed and incorporated into MINEQL); citation in [BB99a]; fixed parameters: Zn and Mn sorption parameters and inventories (Zn 1E-3mol/kg, Mn 4E-4mol/kg); selectivity coefficient (I=0) for cation exchange Na-Ni=3.1
 
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