RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Goethite
Reference: PL96
SCM Type: ECC - Extended Constant Capacitance
Ligand: SO4<2-> - sulfate
Site Type: »Fe-OH
Equation: »Fe-OH + SO4<2-> + H<1+>  ⇔  »Fe-OH2-SO4<1->
LogK: 8.3 ± 0.03         LogK°I=0 (Conversion to I = 0):   8.84         LogK2.31 nm−2 (SSD-normalized):   9.24
Experiment: Potentiometric Titration
Ionic Strength: 0.1 mol/L NaNO3
pH Range: 2.9-8.4
Fit Method: FITEQL
Comment: potentiometric titration (ratio SO4/=FeOH 0.4, 0.6, 0.8), batch exp. (ratio SO4/=FeOH 0.5, 0.8, 1.1), =FeOH total=0.6-0.8 mmol/L; outer-sphere (confirmed by FT-IR and adsorption experiments at different ionic strengths)
 
1 data sets were retrieved