RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Montmorillonite
Reference:	SIT21
SCM Type:	NE - Non-electrostatic
Ligand:	Ra<2+> - radium
Site Type:	»X(w2)-OH
Equation:	»X(w2)-OH + Ra<2+> ⇔ »X(w2)-O-Ra<1+> + H<1+>
LogK:	-5.5 LogK°_I=0 (Conversion to I = 0): -5.50
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.0 mol/L
pH Range:	7 - 11
Ligand Concentration Range:	1.2E-8 mol/L
Fit Method:	PHREEQC
Comment:	experimental data from [TSSY01], S/L ratio: 2-20 g/L; cation exchange and surface complexation combined (2XNa + Ra2+ = X2Ra + 2Na+ with log K = 1.2); see Supplementary Information Table S-2 for these sorption model parameters

1 data sets were retrieved