RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Hematite
Reference: CJ02
SCM Type: TL - Triple Layer
Ligand: ClO4<1-> - perchlorate
Site Type: »Fe-OH
Equation: »Fe-OH + ClO4<1-> + H<1+>  ⇔  »Fe-OH2-ClO4
LogK: 1.27         LogK2.31 nm−2 (SSD-normalized):   1.99
Experiment: Potentiometric Titration
Ionic Strength: NaClO4
Temperature: 298.15 K
pH Range: 4-9
Fit Method: graphic extrapolation
Comment: ionic strength 0.001, 0.01 and 0.1M NaClO4 »Fe-OH2<1+> + ClO4<1-> = »Fe-OH2-ClO4 logK = 7.26 »Fe-OH + H<1+> = »Fe-OH2<1+> -pK1 = logK = -5.99 sum »Fe-OH + ClO4<1-> + H<1+>=»Fe-OH2-ClO4 logK = 7.26-5.99 = 1.27
 
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