Open AccessSemiconductor electrochemistry coal pyrite. Quarterly technical progress report, October--December 1994
Author(s) -
K. OsseoAsare,
Di Wei
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/211417
Subject(s) - pyrite , dissolution , electrochemistry , aqueous solution , chemistry , inorganic chemistry , sulfur , decomposition , mineralogy , electrode , organic chemistry
Pyrite dissolution in acidic solution was found to involve both electrochemical oxidation and chemical decomposition. The mechanism of chemical decomposition of pyrite in acidic solution may involve surface complexation of hydrogen ions. The anodic current of pyrite was relatively small in non-aqueous solution (acetonitrile) compared with that in aqueous solution. The implication is that the direct reaction of holes with S{sub 2}{sup 2{minus}} in the pyrite lattice was not significant and that the dissolution of pyrite required the presence of water. The anodic dissolution product was elemental sulfur which was detected by X-ray diffraction