RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: ZB04a
SCM Type: NE - Non-electrostatic
Ligand: Sr<2+> - strontium
Site Type: »Fe-OH
Equation: »Fe-OH + Sr<2+>  ⇔  »Fe-O-Sr<1+> + H<1+>
LogK: -5.3 ± 0.31         LogK2.31 nm−2 (SSD-normalized):   -4.36
Experiment: Batch Sorption Experiments
Ionic Strength: 1.0 mol/L NaNO3
Temperature: 298.15 K
Ligand Concentration Range: 1E-07-1E-02. 2E-06 mol/L
Fit Method: FITEQL
Comment: average non-electrostatic SC constant of 12 curves, from [KSJ75] and the low surface load data of [K61]; standard deviation relate to the differences in fitted logK constants from the various batch sorption data sets; extrapolation to lower surface loads is good with one-site NEM; Sr(II) surface loads greater than 5 % , model is inadequate
 
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