RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Kaolinite
Reference: AJW98
SCM Type: CC - Constant Capacitance
Ligand: Co<2+> - cobalt(II)
Site Type: Cation exchange site
Equation: »(SiK)2 + Co<2+>  ⇔  »(Si2)Co + 2 K<1+>
LogK: 3.0        LogK°I=0 (Conversion to I = 0):   3.13         LogK2.31 nm−2 (SSD-normalized):   2.12
Experiment: Potentiometric Titration
Ionic Strength: 0.005 mol/L KNO3
Temperature: 313.15 K
Solid/Liquid Ratio: 6.38 g/L
pH Range: 3.5-9
Ligand Concentration Range: 5E-5 mol/L
Fit Method: FITEQL
Comment: relatively sparse ion-exchange sites on the siloxane faces XH (significant adsorption between pH 3 and 5); other logK for 10, 25, 55, 70°C; solid concentration 94m^2/L=6.38g/L
 
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