RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Hematite
Reference: S05
SCM Type: TL - Triple Layer
Ligand: NO2<1-> - nitrite
Site Type: »Fe-OH
Equation: »Fe-OH + NO2<1-> + H<1+>  ⇔  »Fe-OH2-NO2
LogK: 12.6         LogK2.31 nm−2 (SSD-normalized):   13.54
Experiment: Literature
Ionic Strength: 1.0 mol/L
Temperature: 298.15 K
Fit Method: Unknown
Comment: calculation from literature values with standard SSA and SSD at ionic strength of 1M, log K for pHzpc 8.4-8.6 in brackets for pHzpc 9-9.5 »Fe-OH2<1+> + NO2<1-> = »Fe-OH2-NO2 logK = 5.8(5.2) »Fe-OH + H<1+> = »Fe-OH2<1+> -pK1 = logK = 6.8 sum »Fe-OH + NO2<1-> + H<1+> = »Fe-OH2-NO2 logK = 5.8(5.2)+6.8 = 12.6(12.0)
 
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