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: PO4<3-> - phosphate
Site Type: »Ca-OH<-2/3>
Equation: »Ca-OH<-2/3> + PO4<3-> + Ca<2+> + H<1+>  ⇔  »Ca-O-PO2-O-Ca<-2/3> + H2O
LogK: 25.629        LogK°I=0 (Conversion to I = 0):   25.63
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: 1.3E-7 - 2E-5 mol/L
Fit Method: PHREEQC
Comment: Model A1: monodentate-mononuclear coordination (Ca-O-P-O3); original equation in the study: »Ca-OH<-2/3> + CaPO4<1-> = »Ca-O-PO2-O-Ca<-2/3> + OH<1->, log K = 5.17±0.17 (Ca<2+> + PO4<3-> = CaPO4<1->, log K = 6.459; H2O = H<1+> + OH<1->, log K = -14 (wateq4f))
 
1 data sets were retrieved