RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Kaolinite
Reference: EPH13
SCM Type: NE - Non-electrostatic
Ligand: Eu<3+> - europium(III)
Site Type: »X(s)-OH
Equation: »X(s)-OH + Eu<3+>  ⇔  »X(s)-O-Eu<2+> + H<1+>
LogK: 1.3        LogK°I=0 (Conversion to I = 0):   1.98
Experiment: Batch Sorption Experiments
Ionic Strength: 0.05 mol/L NaNO3
Solid/Liquid Ratio: 2.0 g/L
pH Range: 3 - 10
Ligand Concentration Range: 1E-8 mol/L
Fit Method: PHREEQC
Comment: Ion exchange: 3Z<1-> + Eu<3+> = EuZ3, log K = 2.0; Na<1+> + Z<1-> = NaZ, log K = 0.0; Z<1-> + H<1+> = HZ, log K = 0.0
The parameters for sorption model were adjusted using the data from the highest ionic strength 0.5 M NaNO3. For the two lower ionic strengths 0.1 M and 0.05 M the parameters had to be readjusted in order to fit the experimental results.
 
1 data sets were retrieved