Temperature dependence of PCDD/F-formation in boiler ash

P. Wunsch, S. Leichsenring, K. W. Schramm, A. Kettrup

Research output: Contribution to journalArticlepeer-review


In a municipal waste incinerator boiler ash has been sampled from the horizontal superheater pass. Samples were taken at six different sites at flue gas temperatures ranging from 630 °C to 220 °C. Moreover, three samples were taken when the mechanical knocking system was working. A strong increase in concentration is observed, especially at 300-220 °C, which shows that PCDD/F are formed in the boiler outlet. The isomer pattern is consistent with that of typical combustion samples. As predicted by theoretical investigations, the isomer pattern is dominated by only a few isomers at high temperatures, while the isomer distribution at low temperatures is more even.

Original languageEnglish
Pages (from-to)1235-1243
Number of pages9
JournalCancer Letters
Issue number1
StatePublished - 1990
Externally publishedYes


  • Boiler ash
  • Isomer pattern
  • PCDD/F formation
  • Waste incineration


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