Distribution of mono to octa-chlorinated PCDD/Fs in fly ash from a municipal solid-waste incinerator

被引：33
作者：
Lundin, Lisa [1 ]
Marklund, Stellan [1 ]
机构：
[1] Umea Univ, Dept Chem, SE-90187 Umea, Sweden
来源：
ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2008年 / 42卷 / 04期
关键词：
D O I：
10.1021/es0717919
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
We have estimated the concentration and distribution of the mono to octa-chlorinated congeners of polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF) in fly ashes at various sampling points in a large-scale municipal solid waste incinerator at Umea, Sweden, as they cooled from 700 to 170 degrees C. Differences between the ashes were observed, the PCDD homologue profile was found to vary with temperature. The total amount of PCDD and PCDF increased as the temperature decreased in the postcombustion zone. The increase was due to both adsorption to the fly ash and formation of PCDD and PCDF. Mono- to trichlorinated PCDD predominated at high temperatures, whereas hepta- and octachlorinated PCDD predominated at temperatures below 400 degrees C. PCDF predominated over PCDD in the whole temperature range. However,the changes in homologue profile for PCDF were minor. The isomer distribution within the homologue groups was not changed as the temperature decreased in the postcombustion zone.
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页码：1245 / 1250
页数：6
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