RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Hematite
Reference: MDF97
SCM Type: CC - Constant Capacitance
Ligand: Yb<3+> - ytterbium
Site Type: »Fe-OH
Equation: »Fe-OH + Yb<3+> + H2O  ⇔  »Fe-O-Yb(OH)<1+> + 2 H<1+>
LogK: -7.7        LogK°I=0 (Conversion to I = 0):   -6.95         LogK2.31 nm−2 (SSD-normalized):   -6.76
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaNO3
Temperature: 298.15 K
pH Range: 4-8
Ligand Concentration Range: 2E-5 mol/L
Fit Method: FITEQL
Comment: high surface loading [Yb<3+>]/[SOH] = 0.4; in the case of high surface loading, hematite sorption curves do not vary after an oxide-ytterbium contact time equal to one hour
 
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