title: Thermal treatment of electronic waste in a fluidised bed and chemical digestion of solid products.
abstract: The article presents the results of e-waste thermal treatment in a fluidised bed reactor and solid products digestion under acidic conditions. During the processes, measurements of carbon monoxide, carbon dioxide, volatile organic compounds, nitrogen oxides, sulphur dioxide, hydrogen chloride, hydrogen bromide, hydrogen cyanide, ammonia, phenol, aliphatic and aromatic hydrocarbons, hydrogen fluoride and phosgene were carried out. Several digestion tests of the solid residue in sulphuric acid (VI) at 25 °C-65 °C, for 55 min-24 h were conducted. In each case, the dilution method was used, i.e. preliminary digestion in concentrated sulphuric acid (VI) (95%) for 40 min, and then dilution to expected concentrations (30%-50%). Most preferred results were obtained using sulphuric acid (VI) with a target concentration of 40% at 65 °C, where the leaching degrees were 76.56% for copper, 71.67% for iron, 91.89% for zinc and 97.40% for tin. The time necessary to effectively carry out the digestion process was 220 min.
authors.affiliation: Faculty of Chemical Engineering and Technology, Cracow University of Technology, Cracow, Poland awoynarowska@chemia.pk.edu.pl.
authors.forename: Amelia
authors.initials: A
authors.lastname: Woynarowska
authors.affiliation: Faculty of Chemical Engineering and Technology, Cracow University of Technology, Cracow, Poland.
authors.forename: Witold
authors.initials: W
authors.lastname: Żukowski
authors.affiliation: Faculty of Chemical Engineering and Technology, Cracow University of Technology, Cracow, Poland.
authors.forename: Sylwester
authors.initials: S
authors.lastname: Żelazny
mesh_terms: D059029:Electronic Waste / Q000032:analysis*; D017550:Spectroscopy, Fourier Transform Infrared
keywords: E-waste; fluidised bed reactor; leaching; printed circuit board; thermal treatment