RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Kaolinite
Reference: EHL14
SCM Type: NE - Non-electrostatic
Ligand: Nb(OH)5<0> - niobium(V) hydroxyde
Site Type: »X-OH
Equation: »X-OH + Nb(OH)5<0>  ⇔  »X-O-Nb(OH)5<1-> + H<1+>
LogK: 1.79        LogK°I=0 (Conversion to I = 0):   1.68         LogK2.31 nm−2 (SSD-normalized):   1.60
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaClO4
Solid/Liquid Ratio: 1.0 g/L
pH Range: 4 - 11
Ligand Concentration Range: 6.6E-9 mol/L
Fit Method: PHREEQC
Comment: 0.1 M NaClO4 and Ca(ClO4)2 solutions; original equation in the study: »X-O<1-> + Nb(OH)5<0> = »X-O-Nb(OH)5<1-> with logK = 10.8
 
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