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: SeO4<2-> - selenate
Site Type: »Fe-OH
Equation: »Fe-OH + SeO4<2-> + H<1+>  ⇔  »Fe-OH2<1+>-SeO4<2->
LogK: 7.1 ± 0.7         LogK°I=0 (Conversion to I = 0):   7.64         LogK2.31 nm−2 (SSD-normalized):   8.04
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(VI); original equation in the study: »Fe-OH + HSeO4<1-> = »Fe-OH2<1+> - SeO4<2-> with logK = 5.3; formation constant logK = -1.80 for the reaction HSeO4<1-> = SeO4<2-> + H<1+> [Grenthe et al. 1992]
 
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