RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Gibbsite
Reference:	WTWAP03
SCM Type:	CDM - (CD-)MUSIC
Ligand:	AsO3<3-> - arsenite
Site Type:	»Al-singly
Equation:	2 »Al-OH<0.5-> + AsO3<3-> + 3 H<1+> ⇔ [(»Al-OH)2-(OH)2-As(OH)]
LogK:	45.44 LogK°_I=0 (Conversion to I = 0): 45.63 LogK_{2.31 nm⁻²} (SSD-normalized): 46.71
Experiment:	Sorption Isotherms
Ionic Strength:	0.001 mol/L NaNO3
Temperature:	298.0 K
Solid/Liquid Ratio:	20.0 g/L
pH Range:	3.5-9.5
Ligand Concentration Range:	2.67-13.5u mol/L
Fit Method:	ECOSAT
Comment:	logK for Protolysis reaktion and background electrolyte complexation from [WDA00], site-type not clearly defined, assumed to be singly, R^2 = 0.94, residual mean of sum of squares = 1.257E-10; original equation in the study: 2 »Al-OH<0.5-> + H3AsO3 = [(»Al-OH)2-(OH)2-As(OH)] with logK = 2.79 (AsO3<3-> + 3H<1+> = H3AsO3, logK = 42.65 (Appelo and Postma, 1994))

1 data sets were retrieved