RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Illite
Reference: MASKS22
SCM Type: NE - Non-electrostatic
Ligand: UO2<2+> - uranyl(VI)
Site Type: »X(s)-OH
Equation: »X(s)-OH + UO2<2+> + 2 CO3<2->  ⇔  »X(s)-O-UO2(CO3)2<3-> + H<1+>
LogK: 17.0 ± 0.1         LogK°I=0 (Conversion to I = 0):   18.18
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaCl
Temperature: 293.0 K
pH Range: 5.8 - 11
Ligand Concentration Range: 1E-6 mol/L
Fit Method: PHREEQC
Comment: S/L ratio: 0.25 and 50 g/L;
binary surface complexation constants were adopted from [BB09b] (strong sites) and [MVB15] (weak (w1) sites);
ion exchange reaction: 2 Na-illite + UO2<2+> = UO2-illite + 2Na<1+>, log Kc = 0.65;
DIC conc.: 1.0, 2.0, 5.0, 10, 100, 250 mM
 
1 data sets were retrieved