RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Goethite
Reference: GS84a
SCM Type: CC - Constant Capacitance
Ligand: PO4<3-> - phosphate
Site Type: »Fe-OH
Equation: »Fe-OH + PO4<3-> + 2 H<1+>  ⇔  »Fe-HPO4<1-> + H2O
LogK: 28.952        LogK°I=0 (Conversion to I = 0):   30.13         LogK2.31 nm−2 (SSD-normalized):  
Experiment: Sorption Isotherms
Ionic Strength: 0.1 mol/L NaClO4
Fit Method: FITEQL
Comment: adsorption isotherm data from [S79]; FITEQL/MICROQL; original equation: »Fe-OH + H3PO4 = »Fe-HPO4<1-> + H2O + H<1+> with log K = 7.25, formation constant in aqueous solution: PO4<3-> + 3H<1+> = H3PO4 logK = 21.702 [GFFGN03]
 
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