RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Goethite
Reference: SMP20
SCM Type: TL - Triple Layer
Ligand: Ra<2+> - radium
Site Type: »Fe-OH
Equation: »Fe-OH<0.5+> + Ra<2+>  ⇔  »Fe-OH<0.5+>_Ra<2+>
LogK: -3.4        LogK°I=0 (Conversion to I = 0):   -3.22         LogK2.31 nm−2 (SSD-normalized):   -2.46
Experiment: Batch Sorption Experiments
Ionic Strength: 0.01 mol/L NaCl
Solid/Liquid Ratio: 10.0 g/L
pH Range: 2 - 11
Ligand Concentration Range: 1.2E-9 - 3.9E-8 mol/L
Fit Method: MINTEQ
Comment: Outer-sphere adsorption of Ra2+; the change of charge in the d-plane Δzd = 2;
original equation: »Fe-O<0.5-> + Ra<2+> = »Fe-O<-0.5>_Ra<2+>, log K = 3.9 (»Fe-O<0.5-> + H<1+> = »FeOH<0.5+>, log K = 7.3)
 
1 data sets were retrieved