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: NO3<1-> - nitrate
Site Type: »Fe-OH
Equation: »Fe-OH + NO3<1-> + H<1+>  ⇔  »Fe-OH2-NO3
LogK: 9.7         LogK2.31 nm−2 (SSD-normalized):   10.64
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+> + NO3<1-> = »Fe-OH2-NO3 logK = 2.9(2.4) »Fe-OH + H<1+> = »Fe-OH2<1+> -pK1 = logK = 6.8 sum »Fe-OH + NO3<1-> + H<1+> = »Fe-OH2-NO3 logK = 2.9(2.4)+6.8 = 9.7(9.2)
 
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