RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: DH03
SCM Type: DDL - Diffuse Double Layer
Ligand: AsO3<3-> - arsenite
Site Type: »Fe-OH
Equation: »Fe-OH + AsO3<3-> + 3 H<1+>  ⇔  »FeH2AsO3 + H2O
LogK: 36.76        LogK°I=0 (Conversion to I = 0):   36.76         LogK2.31 nm−2 (SSD-normalized):   37.70
Experiment: Batch Sorption Experiments
Ionic Strength: 0.0 mol/L NaClO4
Temperature: 296.15 K
Solid/Liquid Ratio: 0.03 g/L
pH Range: 3.5-10.5
Ligand Concentration Range: 1E-5 - 1E-4 mol/L
Fit Method: FITEQL
Comment: As/Fe ratio 3E-2 - 3E-1; experiments in 0.01M NaClO4; also sorption isotherm at pH=8+-0.2; temperature 23+-0.4°C
 
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