RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: WAT01b
SCM Type: DDL - Diffuse Double Layer
Ligand: NpO2<1+> - neptunyl(V)
Site Type: »Al-OH
Equation: »Al-OH + NpO2<1+> + H2O  ⇔  »Al-O-NpO2(OH)<1-> + 2 H<1+>
LogK: -13.72 ± 0.06         LogK°I=0 (Conversion to I = 0):   -13.83         LogK2.31 nm−2 (SSD-normalized):   -15.11
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaNO3
Solid/Liquid Ratio: 4.0 g/L
pH Range: 2.5-10
Ligand Concentration Range: 1E-6 mol/L
Fit Method: FITEQL
Comment: Si/Al=1.2; experimental data from batch sorption experiments [BPTA96]; [BPTA96]: 20+-0.2°C; no CO2
 
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