RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	amorphous Silica
Reference:	RMCD03
SCM Type:	NE - Non-electrostatic
Ligand:	Th<4+> - thorium
Site Type:	»Si(s)-OH
Equation:	»Si(s)-OH + Th<4+> + 2 H2O ⇔ »Si(s)-O-Th(OH)2<1+> + 3 H<1+>
LogK:	-5.1 ± 0.3 LogK°_I=0 (Conversion to I = 0): -3.71
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.1 mol/L NaClO4
Solid/Liquid Ratio:	0.25 g/L
pH Range:	2 - 9
Ligand Concentration Range:	1.15E-12 mol/L
Fit Method:	FITEQL
Comment:	model 1 (species: »Si(s)-O-Th<3+>, »Si(s)-O-Th(OH)2<1+>, »Si(s)-O-Th(OH)4<1->); Th(IV) hydrolysis constants from Grenthe et al. [42, 43]; total carbonate concentration = 5E−5 M

1 data sets were retrieved