RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Goethite
Reference: RAV94
SCM Type: TL - Triple Layer
Ligand: Na<1+> - sodium
Site Type: »Fe-OH
Equation: »Fe-OH + Na<1+>  ⇔  »Fe-O-Na + H<1+>
LogK: -7.2 ± 0.1         LogK2.31 nm−2 (SSD-normalized):   -6.26
Experiment: Batch Sorption Experiments
Ionic Strength: NaClO4
pH Range: 8.5-12
Fit Method:
Comment: ionic strength varied between 0.005 and 0.016 M; attention: notation of chemical equation is non-standard ! »Fe-O<1-> + Na<1+> = »Fe-O-Na logK = 1.2 »Fe-OH = »Fe-O<1-> + H<1+> pK2 = -logK = 8.4 sum »Fe-OH + Na<1+> = »Fe-O-Na + H<1+> logK=1.2-8.4= -7.2
 
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