Fate of lead oxide during thermal treatment with tetrabromobisphenol A

Sylwia Oleszek, Mariusz Grzegorz Grabda, Etsuro Shibata, Takashi Nakamura

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11 Citations (Scopus)

Abstract

In this paper, the bromination reaction between lead oxide and hydrogen bromide originating from the thermal decomposition of tetrabromobisphenol A (TBBPA), under inert and oxidizing atmospheres, was investigated, using a laboratory-scale furnace. The results obtained under inert conditions indicated that bromination of PbO proceeded simultaneously with debromination of TBBPA, with an average effectiveness of 69% (max. 80%). Volatilization of the formed PbBr2 began at 315°C, intensified at 750°C, and reached 98% at 850°C. The formed organic char served as a source of carbon for reduction of the unreacted lead oxide to metallic lead in the range 315-750°C. Additional experiments conducted at selected temperatures under slightly oxidizing (5vol% O2) and quasi-atmospheric (20vol% O2) conditions showed no significant effects on bromination-evaporation of lead in the studied mixture. However, in isothermal treatment under quasi-atmospheric oxygen levels, complete vaporization of the formed lead bromide was obtained at a temperature of only 650°C.

Original languageEnglish
Pages (from-to)163-171
Number of pages9
JournalJournal of Hazardous Materials
Volume261
DOIs
Publication statusPublished - 2013 Oct 15
Externally publishedYes

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Keywords

  • Bromination-vaporization process
  • Lead recovery
  • Safe disposal of EAF dust
  • WEEE utilization

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

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