RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Goethite
Reference: KYFGD10
SCM Type: ETL - Extended Triple Layer
Ligand: PO4<3-> - phosphate
Site Type: »Fe-OH
Equation: 2 »Fe-OH + PO4<3-> + 3 H<1+>  ⇔  (»Fe-O)2-POOH + 2 H2O
LogK: 31.102         LogK2.31 nm−2 (SSD-normalized):   32.98
Experiment: Batch Sorption Experiments
Ionic Strength: NaNO3
Temperature: 293.15 K
Solid/Liquid Ratio: 1.0 g/L
pH Range: 3 - 11
Ligand Concentration Range: 6.46E-4; 3.23E-4; 1.61E-4 mol/L
Fit Method: GEOSURF
Comment: extended TLM; hypothetical 1.0 M standard states; original equation: 2»Fe-OH + H3PO4 = (»Fe-O)2-POOH + 2H2O with log K = 9.4, formation constant in aqueous solution: PO4<3-> + 3H<1+> = H3PO4 logK = 21.702 [GFFGN03]; 0.001, 0.01, 0.1 M NaNO3
 
1 data sets were retrieved