wAbstract
@A thermodynamic dataset for arsenic species in As-O-H-S-Fe-Ba
system was compiled from the literature. Using this dataset, Eh-pH
diagrams for the systems As-O-H, As-O-H-S, As-O-H-S-Fe, As-O-H-Ba,
and As-O-H-S-Fe-Ba were constructed at 25@and 1 bar. The inclusion
of thioarsenite species in the systems As-O-H-S and As-O-H-S-Fe
results in substantial differences from previously published Eh-pH
diagrams. There are considerable differences in the thermodynamic
properties for orpiment, realgar, scorodite, arsenopyrite, barium
arsenate, and barium hydrogen arsenate, which result in vastly
different stability fields when different values are adopted.
Keywords: Eh-pH diagrams; Arsenic; Compilationx
Introduction
Internally consistent thermodynamic properties for arsenic
Eh-pH diagrams
@As-O-H
@As-O-H-S
@As-O-H-S-Fe
@As-O-H-Ba and As-O-H-S-Fe-Ba
Concluding remarks
Acknowledgments
References