RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Bentonite
Reference:	MGLAK09
SCM Type:	CDM - (CD-)MUSIC
Ligand:	SeO3<2-> - selenite
Site Type:	»Al-doubly
Equation:	2 X-OH + SeO3<2-> + 3 H<1+> ⇔ (»X-O)2-SeOH<1+> + 2 H2O
LogK:	23.3 LogK°_I=0 (Conversion to I = 0): 23.90
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.05 mol/L NaNO3
Temperature:	298.15 K
pH Range:	3-10
Ligand Concentration Range:	5E-7 mol/L
Fit Method:	PHREEQC
Comment:	original reaction equation: H2SeO3 + »X-OH2<1+> + »X-OH = (»X-O)2-SeOH<1+> + 2H2O, logK = 7.5; site type: Al(Oh) - O - Al(Oh); S/L ratio ranged from 5 - 40 g/L; transformation to 2 »X-OH + H2SeO3 + H<1+> = (»X-O)2-SeOH<1+> + 2 H2O with logK = 12.3; SeO3<2-> +2H<1+> = H2SeO3, logK = 11.0 [ONOOR05]

1 data sets were retrieved