RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Bentonite
Reference: SVSBC98
SCM Type: CC - Constant Capacitance
Ligand: CO3<2-> - carbonate
Site Type: »X-OH
Equation: »X-OH + CO3<2-> + 2 H<1+>  ⇔  »X-OH2-HCO3
LogK: 21.6        LogK°I=0 (Conversion to I = 0):   22.24         LogK2.31 nm−2 (SSD-normalized):   25.54
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L granitic water
Temperature: 298.0 K
Solid/Liquid Ratio: 35.42 g/L
pH Range: 4-11
Ligand Concentration Range: 4.8E-2 mol/L
Fit Method: FITEQL
Comment: recaculation of the given equation: »X-OH + H<1+> = »X-OH2<1+> logK2 =- pK1; CO3<2->+H<1+>=HCO3<1-> logKCO3=10.327; »X-OH2<1+>+HCO3<1->=»X-OH2-HCO3 logK9; »X-OH2<1+>+CO3<2->+H<1+>=»X-OH2-HCO3 logK2+logKCO3+logK9
 
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