RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Magnetite
Reference: MGDRD06
SCM Type: TL - Triple Layer
Ligand: SeO3<2-> - selenite
Site Type: »Fe-OH
Equation: »Fe-OH + SeO3<2->  ⇔  »Fe-H-SeO3 + H2O
LogK: 20.29 ± 0.3         LogK°I=0 (Conversion to I = 0):   20.72         LogK2.31 nm−2 (SSD-normalized):   21.23
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaCl
Temperature: 298.15 K
Solid/Liquid Ratio: 5.0 g/L
pH Range: 2-12
Ligand Concentration Range: 2E-5 mol/L
Fit Method: FITEQL
Comment: Selenium(IV); original equation in the study: »Fe-OH + HSeO3<1-> + H<1+> = »Fe-H-SeO3 + H2O with logK = 9.7; formation constant logK = -10.59 for the reaction HSeO3<1-> = SeO3<2-> + H<1+> [Grenthe et al. 1992]
 
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