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Distribution of mono- to octa-chlorinated PCDD/F in fly ashes from a municipal solid waste incinerator
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- Lundin, Lisa (author)
- Umeå universitet,Kemiska institutionen
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- Marklund, Stellan (author)
- Umeå universitet,Kemiska institutionen
- (creator_code:org_t)
- 2008-01-15
- 2004
- English.
- In: Environmental Science and Technology. - Washington : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 42:4, s. 1245-1250
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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 Umeå, Sweden, as they cooled from 700 to 170 °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 °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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Keyword
- dibenzo P dioxins
- de novo synthesis
- MSW incineration
- isomer patterns
- thermal formation
- mass-balance
- combustion
- PCDD/PCDF
- phenols
- precursors
Publication and Content Type
- ref (subject category)
- art (subject category)
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