title: Preliminary study of treatment of sulphuric pickling water waste from steelmaking by bio-oxidation with Thiobacillus ferrooxidans.
abstract: This report looks at the laboratory-scale recovery of iron oxides (alpha Fe2O3 type) through bio-oxidation with Thiobacillus ferrooxidans of the ferrous sulphate contained in steel industry sulphuric pickling liquors. This is done by calcining iron sulphates and iron and ammonium sulphates obtained from the crystallization of the oxidized solution. The products of the bacterial reaction and the iron oxides are then studied according to calcination temperature. The process carried out produced 50 kg of alpha Fe2O3 per m3 of waste pickling liquor at 700 degrees C with 99.8% weight iron recovery.
authors.affiliation: Geomining Technological Institute of Spain (ITGE), Madrid, Spain.
authors.forename: F J
authors.initials: FJ
authors.lastname: Garcia
authors.forename: A
authors.initials: A
authors.lastname: Rubio
authors.forename: E
authors.initials: E
authors.lastname: Sainz
authors.forename: P
authors.initials: P
authors.lastname: Gonzalez
authors.forename: F A
authors.initials: FA
authors.lastname: Lopez
mesh_terms: D005296:Ferrous Compounds / Q000378:metabolism; D007220:Industrial Waste; D010084:Oxidation-Reduction; D013232:Steel; D013431:Sulfates / Q000378:metabolism*; D013855:Thiobacillus / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D005296:Ferrous Compounds; D007220:Industrial Waste; D013431:Sulfates; D014874:Water Pollutants, Chemical; D013232:Steel; C020748:ferrous sulfate