Formation of mixed halogenated dibenzo-p-dioxins and dibenzofurans (PXDD/Fs)

Anam Saeed, Mohammednoor Altarawneh, Bogdan Z. Dlugogorski

Research output: Contribution to journalArticle

Abstract

This contribution investigates mechanistic and kinetic parameters pertinent to formation of mixed dibenzo-p-dioxins and dibenzofurans (PXDD/Fs) from the condensation reactions involving 2-chlorophenoxy (2-CPxy) and 2-bromophenoxy (2-BPxy) radicals. Keto-ether structures act as direct intermediates for the formation of DD, 1-MCDD, 1-MBDD, 1-B,6-CDD and 1-B,9-CDD molecules. Likewise, diketo adducts initiate the formation of 4-MCDF, 4-MBDF and 4-B,6-CDF compounds through interconversion and rearrangement reactions. As formation mechanisms of halogenated dibenzo-p-dioxins and dibenzofurans from precursors of brominated and chlorinated phenols are insensitive to substitution at meta and para sites, our mechanistic and kinetic analysis of reactions involving 2-BPxy and 2-CPxy should also apply to higher halogenated phenoxy radicals.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalChemosphere
Volume137
Issue numberOctober
Early online date6 Jul 2015
DOIs
Publication statusPublished - Oct 2015
Externally publishedYes

Fingerprint Dive into the research topics of 'Formation of mixed halogenated dibenzo-p-dioxins and dibenzofurans (PXDD/Fs)'. Together they form a unique fingerprint.

  • Cite this