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

被引：6

作者：

Saeed, Anam ^{[1
]}

Altarawneh, Mohammednoor ^{[1
]}

Dlugogorski, Bogdan Z. ^{[1
]}

机构：

[1] Murdoch Univ, Sch Engn & Informat Technol, Murdoch, WA 6150, Australia

来源：

CHEMOSPHERE | 2015年 / 137卷

基金：

澳大利亚研究理事会;

关键词：

Chlorophenol; Bromophenol; Polyhalogenated dibenzo-p-dioxins and dibenzofurans (PXDD/Fs); Reaction mechanism; Reaction rate constants; HIGH-TEMPERATURE PYROLYSIS; BROMINATED-CHLORINATED DIBENZODIOXINS; COMPLETE SERIES REACTIONS; DIPHENYL ETHERS PBDES; DE-NOVO-SYNTHESIS; MECHANISMS; OXIDATION; INCINERATION; EMISSIONS; PBDD/FS;

D O I：

10.1016/j.chemosphere.2015.06.054

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：149 / 156

页数：8

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