RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Gibbsite
Reference: G86a
SCM Type: CC - Constant Capacitance
Ligand: AsO4<3-> - arsenate
Site Type: »Al-OH
Equation: »Al-OH + AsO4<3-> + H<1+>  ⇔  »Al-AsO4<2-> + H2O
LogK: 17.04        LogK°I=0 (Conversion to I = 0):   18.11         LogK2.31 nm−2 (SSD-normalized):   19.62
Experiment: Batch Sorption Experiments
Ionic Strength: 0.1 mol/L NaCl
Temperature: 293.15 K
Solid/Liquid Ratio: 2.12 g/L
pH Range: 3.5-10
Ligand Concentration Range: 2.7E-4 mol/L
Fit Method: FITEQL
Comment: experimental raw data from [HPQ71]; original reaction equation in the study: »Al-OH + H3AsO4 = »Al-AsO4<2-> + 2 H<1+> + H2O with logK = -3.58, formation constant in aqueous solution: AsO4<3-> + 3 H<+> = H3AsO4<0> logK = 20.62 [GFFGN03]
 
1 data sets were retrieved