De-novo formation of dioxins and furans and the memory effect in waste incineration flue gases

被引：66

作者：

Cunliffe, Adrian M. ^{[1
]}

Williams, Paul T. ^{[1
]}

机构：

[1] Univ Leeds, Energy & Resources Res Inst, Leeds LS2 9JT, W Yorkshire, England

来源：

WASTE MANAGEMENT | 2009年 / 29卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

DIBENZO-PARA-DIOXINS; FLY-ASH; ISOMER PATTERNS; P-DIOXINS; MSW INCINERATION; PCDD/PCDF; COMBUSTION; MECHANISM; PCDF; DECOMPOSITION;

D O I：

10.1016/j.wasman.2008.04.004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The formation of dioxin(polychlorinated-p-dibenzodioxins-PCDD) and furan (polychlorinated dibenzofurans - PCDF) in waste incineration flyash in relation to temperature has been investigated in a bench scale reactor. The PCDD/PCDF released into the exhaust gases of the reactor and trapped in a condensation and vapour phase adsorption system were also determined. The concentrations of PCDD/PCDF in the flyash were analysed in detail for all congeners and isomers including the mono-, di- and tri-PCDD/PCDF. De-novo synthesis of PCDD/PCDF was clearly seen in the flyash with large changes in concentrations of PCDD/PCDF with only small changes in temperature. Exhaust gas PCDD/PCDF were detected at all temperatures, with the maximum emission occurring at a flyash temperature of 350 C, where the equivalent of over 42 times the total dioxin/furan concentration of the original flyash was lost to the vapour phase per unit mass of initial flyash. Although the desorbed species were mainly the lower mono- to tri-congener group of dioxins and furans. the desorbed dioxin/furans had a considerable toxic equivalent value. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：739 / 748

页数：10

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