RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Beidellite
Reference:	TZMS96
SCM Type:	TL - Triple Layer
Ligand:	UO2<2+> - uranyl(VI)
Site Type:	»Si-OH
Equation:	»Si-OH + 3 UO2<2+> + 5 H2O ⇔ »Si-O-(UO2)3(OH)5 + 6 H<1+>
LogK:	-16.8
Experiment:	Batch Sorption Experiments
Ionic Strength:	NaClO4
Temperature:	298.15 K
Solid/Liquid Ratio:	1.5 g/L
pH Range:	4-8.5
Ligand Concentration Range:	8.5E-6 mol/L
Fit Method:	FITEQL
Comment:	logK from [MZST95] for montmorillonite, ionic strengths: 0.1, 1E-2.3, 1E-2.91M NaClO4, or 1E-2.17 and 1E-1.13M Ca(ClO4)2; ion exchange reactions: Na<+> + X<-> = NaX (logK=10.0), H<+> + X<-> = HX (logK=10.1), Ca<2+> + 2X<-> = CaX2 (logK=23.4), UO2<2+> + 2X<-> = UO2X2 (logK=23.2), UO2(OH)<+> + H2O + X<-> = UO2(OH)X + H<+> (logK=4.8), Al<3+> + 3X<-> = AlX3 (logK=36.5), Al<3+> + H2O + 2X<-> = Al(OH)X2 + H<+> (logK=18.2), Al<3+> + 2H2O + X<-> = Al(OH)2X + 2H<+> (logK=-0.1)

1 data sets were retrieved