RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Montmorillonite
Reference: G02a
SCM Type: CC - Constant Capacitance
Ligand: AsO3<3-> - arsenite
Site Type: »X-OH
Equation: »X-OH + AsO3<3-> + 2 H<1+>  ⇔  »X-HAsO3<1-> + H2O
LogK: 30.78        LogK°I=0 (Conversion to I = 0):   31.27         LogK2.31 nm−2 (SSD-normalized):   30.59
Experiment: Batch Sorption Experiments
Ionic Strength: 0.01 mol/L NaCl
Fit Method: FITEQL
Comment: original reaction equation in the study: »X-OH + H3AsO3 = »X-HAsO3<1-> + H<1+> + H2O with logK = -3.92, formation constant in aqueous solution: H3AsO3 = AsO3<3-> + 3H<1+> with logK = -34.7 [MBK00]
 
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