RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: amorphous Al(OH)₃
Reference: G86a
SCM Type: CC - Constant Capacitance
Ligand: AsO4<3-> - arsenate
Site Type: »Al-OH
Equation: »Al-OH + AsO4<3-> + 3 H<1+>  ⇔  »Al-H2AsO4 + H2O
LogK: 30.51        LogK°I=0 (Conversion to I = 0):   31.05         LogK2.31 nm−2 (SSD-normalized):   32.95
Experiment: Batch Sorption Experiments
Ionic Strength: 0.01 mol/L NaClO4
Temperature: 298.15 K
Solid/Liquid Ratio: 0.13 g/L
pH Range: 5-8.5
Ligand Concentration Range: 4E-4 mol/L
Fit Method: FITEQL
Comment: experimental raw data from [AM79]; original reaction equation in the study: »Al-OH + H3AsO4 = »Al-H2AsO4 + H2O with logK = 9.89, formation constant in aqueous solution: AsO4<3-> + 3 H<+> = H3AsO4<0> logK = 20.62 [GFFGN03]
 
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