RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Calcite
Reference: SPJL11
SCM Type: CC - Constant Capacitance
Ligand: Ca<2+> - calcium
Site Type: »Ca(s)-CO3<1->
Equation: »Ca(s)-CO3<1-> + Ca<2+> + PO4<3-> + H<1+>  ⇔  »Ca(s)-HPO4-Ca<1+> + CO3<2->
LogK: 16.139        LogK°I=0 (Conversion to I = 0):   16.14
Experiment: Batch Sorption Experiments
Ionic Strength: 0.0 mol/L
Solid/Liquid Ratio: 100.0 g/L
pH Range: 6.5 - 9.1
Ligand Concentration Range: 1.3E-7 - 5E-5 mol/L
Fit Method: PHREEQC
Comment: model 1; original equation in the study: »Ca(s)CO3<1-> + CaHPO4<0> = »Ca(s)HPO4Ca<1+> + CO3<2-> with log K = 0.90±0.06 (Equilibrium constants for aqueous speciation of phosphate taken from wateq4f database (Parkhurst and Appelo, 1999): Ca<2+> + HPO4<2-> = CaHPO4<0>, log K = 2.739; H<1+> + PO4<3-> = HPO4<2->, log K = 12.5±0.03)
 
1 data sets were retrieved