RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: BB93
SCM Type: DDL - Diffuse Double Layer
Ligand: NpO2<1+> - neptunyl(V)
Site Type: »Fe(s)-OH
Equation: »Fe(s)-OH + NpO2<1+>  ⇔  »Fe(s)-O-NpO2 + H<1+>
LogK: -0.98        LogK°I=0 (Conversion to I = 0):   -0.98         LogK2.31 nm−2 (SSD-normalized):   -0.89
Experiment: Batch Sorption Experiments
Ionic Strength: 0.00733 mol/L ground water
Temperature: 293.15 K
pH Range: 3-9
Ligand Concentration Range: 4.5E-13 - 4.5E-11 mol/L
Fit Method: FITEQL
Comment: data taken from [GASM91] and reinterpreted using the DDL model; [Np] from 4.5E-13 to 4.5E-11 M; artificial ground water: 2.8E-3M Na+, 1E-4K+, 1.8E-4M Mg2+, 3.6E-4 Ca2+, 2E-3 Cl-, 1E-4M SO42-, 1.8E-3M SUM CO32-
 
1 data sets were retrieved