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Research paper Recovery of iron from bio-oxidized sulphuric pickling waste water by precipitation as basic sulphates

AuthorsLópez-Delgado, Aurora ; Alguacil, Francisco José; López Gómez, Félix Antonio
KeywordsRecovery of iron
Waste water
sulphuric acid
Issue DateMay-1997
CitationHydrometallurgy 45 (1-2) : 97-112 (1997)
AbstractPickling waste waters are listed as hazardous wastes in most industrialized countries, mainly due to their corrosive properties and also to their content of ferrous iron and sulphuric acid. In the present work the recovery of iron and sulphuric acid from these wastes has been attained. Iron was recovered by means of the precipitation of basic sulphates (ammoniojarosite and feOHSO4). The relationship between the ferric hydroxysulphates in the precipitate as a function of heating time was studied. Solids were characterized by XRD and FTIR SEM/TEM techniques. Thermal decomposition studies of the solids were made.
Publisher version (URL)http://dx.doi.org/10.1016/S0304-386X(96)00066-7
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