RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: AVTC02
SCM Type: DDL - Diffuse Double Layer
Ligand: CO3<2-> - carbonate
Site Type: »Fe(w)-OH
Equation: »Fe(w)-OH + CO3<2-> + 2 H<1+>  ⇔  »Fe(w)-O-CO2H + H2O
LogK: 20.37 ± 0.2         LogK°I=0 (Conversion to I = 0):   21.01         LogK2.31 nm−2 (SSD-normalized):   22.10
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaNO3
Solid/Liquid Ratio: 0.078 g/L
Fit Method: PEST
Comment: PEST in combination with PHREEQC-2; values from batch sorption experiments of [ZGSR87]; uncertainty interval indicates the aproximate 95% confidence limits; pK from [DM90] with 0.87mM Fe=78mg ferrihydrite/L with 0.174 mM sites; for anions only the weak sites are active
 
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