RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Magnetite
Reference: RBM83
SCM Type: TL - Triple Layer
Ligand: NO3<1-> - nitrate
Site Type: »Fe-OH
Equation: »Fe-OH + NO3<1-> + H<1+>  ⇔  »Fe-OH2-NO3
LogK: 6.2         LogK2.31 nm−2 (SSD-normalized):   5.93
Experiment: Potentiometric Titration
Ionic Strength: KNO3
Temperature: 303.15 K
Solid/Liquid Ratio: 20.0 g/L
pH Range: 4-9
Ligand Concentration Range: 0.001-0.1 mol/L
Fit Method: graphic extrapolation
Comment: ionic strength 0.1, 0.01 and 0.001M calulation with Kint anion from equ. 17 [BFMR84] and pK1 for anion: »Fe-OH2<1+>+A<1->=»Fe-O-H2-A logK=1.8 »Fe-OH2<1+>=»Fe-OH+H<1+> pK1=4.4 = -logK equ. invers logK=4.4 sum equ »Fe-OH+NO3<1->+H<1+>=»Fe-OH2-NO3 logK=1.8+4.4=6.2
 
1 data sets were retrieved