RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Quartz
Reference: DW14
SCM Type: DDL - Diffuse Double Layer
Ligand: UO2<2+> - uranyl(VI)
Site Type: »Si-OH
Equation: 2 »Si-OH + UO2<2+> + CO3<2->  ⇔  (»Si-OH)2-UO2CO3
LogK: 16.94        LogK°I=0 (Conversion to I = 0):   17.30
Experiment: Batch Sorption Experiments
Ionic Strength: 0.01 mol/L NaNO3
Temperature: 295.5 K
Solid/Liquid Ratio: 100.0 g/L
pH Range: 3-9.5
Ligand Concentration Range: 1E-6 mol/L
Fit Method: PHREEQC
Comment: original reaction equation in the study: 2 »Si-OH + UO2<2+> + H2CO3 = (»Si-OH)2-UO2CO3 + 2 H<1+> with logK = 0.26, formation constant in aqueous solution: H2CO3 = CO3<2-> + 2H<1+> logK = -16.68 [SM96a]
 
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