RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Goethite
Reference: CRCO08
SCM Type: TL - Triple Layer
Ligand: Sr<2+> - strontium
Site Type: »Fe-OH
Equation: »Fe-OH + Sr<2+> + H2O  ⇔  »Fe-O-Sr(OH) + 2 H<1+>
LogK: 5.8        LogK°I=0 (Conversion to I = 0):   6.01         LogK2.31 nm−2 (SSD-normalized):   6.74
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaCl
Temperature: 298.13 K
Solid/Liquid Ratio: 40.0 g/L
pH Range: 4-10
Ligand Concentration Range: 1E-3 - 1E-6 mol/L
Fit Method: FITEQL
Comment: calulated value equ. 1 according [S05] 1. »Fe-O<1-> + Sr<2+> + H2O = »Fe-O-Sr(OH) + H<1+> logK = 10.2 2. »Fe-OH = »Fe-O<1-> + H<1+> pK2 = -logK = 6.4 3. sum »Fe-OH + Sr<2+> + H2O = »Fe-O-Sr(OH) + 2 H<1+> logK= 10.2 - 6.4 = 5.8
 
1 data sets were retrieved