RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Bentonite
Reference: CJGMW14
SCM Type: DDL - Diffuse Double Layer
Ligand: PO4<3-> - phosphate
Site Type: »Al-OH
Equation: »Al-OH + PO4<3-> + H2O  ⇔  »Al-H-PO4<1-> + 2OH<1->
LogK: -2.75        LogK°I=0 (Conversion to I = 0):   -1.79         LogK2.31 nm−2 (SSD-normalized):   -4.36
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaCl
Temperature: 295.0 K
Ligand Concentration Range: 2E-5; 2E-4 mol/L
Fit Method: PHREEQC
Comment: Model 1; S/L ratio = 0.5, 1, 3 g/L; original equation in the article: »Al-OH + HPO4<2-> = »Al-H-PO4<1-> + OH<1-> with logK = -1.1, conversion on the basis of logK values from the Nagra/PSI Chemical Thermodynamic Data Base
 
1 data sets were retrieved