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Journal of Material Cycles and Waste Management

, Volume 20, Issue 1, pp 201–213 | Cite as

Distribution of inorganic bromine and metals during co-combustion of polycarbonate (BrPC) and high-impact polystyrene (BrHIPS) wastes containing brominated flame retardants (BFRs) with metallurgical dust

  • Mariusz Grabda
  • Sylwia Oleszek
  • Etsuro Shibata
  • Takashi Nakamura
ORIGINAL ARTICLE
  • 150 Downloads

Abstract

This study focused on the thermal degradation of polycarbonate (BrPC) and high-impact polystyrene (BrHIPS), containing different brominated flame retardants. The evolved inorganic bromine was utilized for the separation of metals present in electric arc furnace dust (EAFD). The thermal degradation of BrPC generated inorganic gaseous HBr (69%) and condensable Br2 (31%). The bromine evolved from BrHIPS was detected almost entirely in a condensed phase as SbBr3. When mixed with EAFD, the evolved inorganic bromine reacted immediately with the metallic components of zinc and lead, but not with iron. The best bromination efficiencies were obtained during the isothermal heating (80 min at 550 °C) of the mixtures at mass ratios of 6:1 and 9:1 w/w under oxidizing conditions. The achieved brominating rates reached 78 and 81% for zinc and 90 and 94% for lead in 6:1 and 9:1 BrPC:EAFD, respectively, and 47 and 65% for zinc and 67 and 63% for lead in 6:1 and 9:1 BrHIPS:EAFD, respectively. The oxidizing condition favored complete vaporization of the formed bromides.

Keywords

Polycarbonate and high-impact polystyrene Waste combustion Inorganic bromine utilization Metallurgical dust Metals separation 

Notes

Acknowledgements

This work was supported by a KAKENHI (23246158) under a Grant-in-Aid for Scientific Research (A) and the High Efficiency Rare Elements Extraction Technology Area in the Tohoku Innovation Materials Technology Initiatives for Reconstruction from the Ministry of Education, Culture, Sports, Science and Technology in Japan.

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Copyright information

© Springer Japan 2016

Authors and Affiliations

  • Mariusz Grabda
    • 1
    • 2
  • Sylwia Oleszek
    • 1
    • 2
    • 3
  • Etsuro Shibata
    • 1
  • Takashi Nakamura
    • 1
  1. 1.Institute of Multidisciplinary Research for Advanced Materials (IMRAM)Tohoku UniversitySendaiJapan
  2. 2.Institute of Environmental Engineering of the Polish Academy of SciencesZabrzePoland
  3. 3.Graduate School of Science and EngineeringKagoshima UniversityKagoshimaJapan

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