RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Kaolinite
Reference:	RZEAA88
SCM Type:	TL - Triple Layer
Ligand:	CrO4<2-> - chromate
Site Type:	»Si-OH
Equation:	»Si-OH + CrO4<2-> + 2 H<1+> ⇔ »Si-OH2-CrO4
LogK:	17.8 LogK°_I=0 (Conversion to I = 0): 18.44
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.1 mol/L NaClO4
Solid/Liquid Ratio:	20.0 g/L
pH Range:	4.5-7.5
Ligand Concentration Range:	1E-7 mol/L
Fit Method:	FITEQL
Comment:	logK for 1E-7 M CrO42- (misprint in [ZCSA88] 1E-4); more logK for other ionic strengthes: 14.9 (5E-7M), 14.5 (1E-6M), 13.9 (5E-6M); neutral complex only a fitting parameter (contributes significantly at lower pH and lower chromate concentrations, chemical justification not evident); also in [ZCSA88]

1 data sets were retrieved