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-> + Eu<3+>  ⇔  »Al-O-Eu-HPO4
LogK: 19.85        LogK°I=0 (Conversion to I = 0):   21.78         LogK2.31 nm−2 (SSD-normalized):   18.24
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaCl
Temperature: 295.0 K
pH Range: 2-10
Ligand Concentration Range: 2E-5; 2E-4 mol/L
Fit Method: PHREEQC
Comment: Model 3; Model 1 selected as the second sub-model for the ternary system; [Eu(III)] = 2.5E-6 and 5.08E-8 mol/L; S/L ratio = 0.5, 1, 3 g/L; original equation in the article: »Al-OH + HPO4<2-> + Eu<3+> = »Al-O-Eu-HPO4 + H<1+> with logK = 7.5, conversion on the basis of logK values from the Nagra/PSI Chemical Thermodynamic Data Base
 
1 data sets were retrieved