RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Lepidocrocite
Reference: D86
SCM Type: CC - Constant Capacitance
Ligand: Si(OH)4<0> - Silicic acid
Site Type: »Fe-OH
Equation: »Fe-OH + Si(OH)4<0>  ⇔  »Fe-SiO4-H2<1-> + H<1+> + H2O
LogK: -4.94        LogK°I=0 (Conversion to I = 0):   -5.05         LogK2.31 nm−2 (SSD-normalized):   -4.00
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaClO4
Solid/Liquid Ratio: 0.889 g/L
pH Range: 8.3 and 7.0
Ligand Concentration Range: 1E-3 mol/L
Fit Method: SURFEQL
Comment: further informations in [D85]?; solid concentration 10mmol/L; original reaction equation in the study is given as »Fe-OH + H2SiO4<2-> + H<1+> = »Fe-SiO4-H2<1-> + H2O, logK = 18.2; conversion done with the equation Si(OH)4(aq) = 2H<1+> + SiO2(OH)2<2-> with logK = -23.140
 
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