RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Goethite
Reference: LM87
SCM Type: TL - Triple Layer
Ligand: CO3<2-> - carbonate
Site Type: »Fe-OH
Equation: »Fe-OH + CO3<2-> + 2 H<1+>  ⇔  »Fe-OH2-HCO3
LogK: 22.3        LogK°I=0 (Conversion to I = 0):   22.94         LogK2.31 nm−2 (SSD-normalized):   23.02
Experiment: Literature
Ionic Strength: 0.1 mol/L NaNO3
Temperature: 293.15 K
Solid/Liquid Ratio: 0.00522 g/L
pH Range: 9+-0.6
Fit Method: MINEQL
Comment: log K values from [BM82b] (estimated from a comparison of the equilibrium constants which define the exchange of the anion for the hydroxyl group of water and the hydroxyl group of a goethite surface site [SKS80]); temperature 20+-2°C; addition of Na2CO3 (15 to 1788 meq/L)
 
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