RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Biotite
Reference:	CWCC07
SCM Type:	CC - Constant Capacitance
Ligand:	AsO4<3-> - arsenate
Site Type:	»X(w)-OH
Equation:	»X(w)-OH + AsO4<3-> + 2 H<1+> ⇔ »X(w)-O-As(OH)O2<1-> + H2O
LogK:	24.55 ± 0.8 LogK°_I=0 (Conversion to I = 0): 24.72
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.001 mol/L NaNO3
Temperature:	297.15 K
Solid/Liquid Ratio:	4.3 g/L
pH Range:	3.2 - 11.0
Ligand Concentration Range:	1.3E-5 mol/L
Fit Method:	MINEQL
Comment:	original reaction equation in the study: »X(w)-OH + H2AsO4<1-> = »X(w)-O-As(OH)O2<1-> + H2O with log K = 6.2±0.8, formation constant in aqueous solution: AsO4<3-> + 2H<1+> = H2AsO4<1-> logK = 18.35 (Schecher, W. D.; McAvoy, D. C. MINEQL+, V. 4.5, Users Manual, Hallowell, ME, 1998)

1 data sets were retrieved