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Thermal decomposition of ferric and ammonium sulphates obtained by bio-oxidation of water pickling liquors with thiobacillus ferrooxidans

AuthorsLópez-Delgado, Aurora ; López Gómez, Félix Antonio
KeywordsDecomposition of ferric and ammonium
Water pickling liquors
Thiobacillus ferrooxidans
Issue Date1995
CitationJournal of Materials Science 30 (20) : 5130-5138 (1995)
AbstractSulphuric water pickling liquor containing ferrous sulphates was oxidized by Thiobacillus ferrooxidans at different pHs. The oxidized solution was then evaporated and crystallized, and products characterized by X-ray powder diffraction, X-ray high temperature powder diffraction and Fourier transform infrared (FTIR) spectrometry. The thermal decomposition of these materials, studied by calorimetric and thermogravimetric techniques, shows that iron(i,) hydroxysalts and monoammonium and triammonium salts are formed during the oxidation-evaporation-crystallization process. However, this formation depends upon pH.
Publisher version (URL)http://dx.doi.org/10.1007/BF00356060
Appears in Collections:(CENIM) Artículos
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