RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: HZ16
SCM Type: ES - Extended Stern
Ligand: AsO4<3-> - arsenate
Site Type: »Fe-singly
Equation: »Fe-OH<-0.5> + AsO4<3-> + 3 H<1+>  ⇔  »Fe-O<-0.17>-AsO(OH)2<-0.33> + H2O
LogK: 29.94 ± 0.06         LogK2.31 nm−2 (SSD-normalized):   30.01
Experiment: Batch Sorption Experiments
Ionic Strength: NaNO3
pH Range: 4-12
Fit Method: Unknown
Comment: consistent subset of data compiled (Fig. S4–S12†) comprising 280 data points with a large range of variation in pH, initial AsO4 concentration, type and concentration of the background electrolyte, and Fh concentration, collected by 6 different research groups. ref. 39–43,51; doubly protonated monodentate complex MH2; Log K values for the monodentate species, formed from either ≡FeOH(a) or ≡FeOH(b), are kept equal
 
1 data sets were retrieved