RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results

Surface Complex Formation Data:

Mineral:	Calcite
Reference:	SPJL12
SCM Type:	CDM - (CD-)MUSIC
Ligand:	AsO4<3-> - arsenate
Site Type:	»Ca-OH<-2/3>
Equation:	2 »Ca-OH<-2/3> + AsO4<3-> + Ca<2+> + 2 H<1+> ⇔ »Ca2-O2-AsOO-Ca<-1/3> + 2 H2O
LogK:	36.04 LogK°_I=0 (Conversion to I = 0): 36.04
Experiment:	Batch Sorption Experiments
Ionic Strength:	0.0 mol/L NaCl
Temperature:	294.15 K
Solid/Liquid Ratio:	100.0 g/L
pH Range:	7 - 8.3
Ligand Concentration Range:	1.1E-6; 4.6E-6 mol/L
Fit Method:	PHREEQC
Comment:	Model C: bidentate-binuclear coordination (Ca2-O2-As-O2); original equation in the study: 2»Ca-OH<-2/3> + CaAsO4<1-> = »Ca2-O2-AsOO-Ca<-1/3> + 2OH<1->, log K = 3.68±0.08 (Ca<2+> + AsO4<3-> = CaAsO4<1->, log K = 4.36 (Bothe and Brown, 1999); H2O = H<1+> + OH<1->, log K = -14 (wateq4f))

1 data sets were retrieved