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PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface

[Image: see text] The discrepancies between polychlorinated dibenzo-p-dioxin to polychlorinated dibenzofuran (PCDD to PCDF) ratios in laboratory and field studies in the exhaust of combustion sources are not fully explained by available formation models. In this paper we present the results of exper...

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Autores principales: Nganai, Shadrack, Dellinger, Barry, Lomnicki, Slawo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2014
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4255659/
https://www.ncbi.nlm.nih.gov/pubmed/25372621
http://dx.doi.org/10.1021/es504253w
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author Nganai, Shadrack
Dellinger, Barry
Lomnicki, Slawo
author_facet Nganai, Shadrack
Dellinger, Barry
Lomnicki, Slawo
author_sort Nganai, Shadrack
collection PubMed
description [Image: see text] The discrepancies between polychlorinated dibenzo-p-dioxin to polychlorinated dibenzofuran (PCDD to PCDF) ratios in laboratory and field studies in the exhaust of combustion sources are not fully explained by available formation models. In this paper we present the results of experimental studies of the surface mediated formation of PCDD/F at the conditions mimicking the combustion cool zone from a mixture of 1,2-dichlorobenzene (1,2-DCBz) and 2-monochlorophenol (2-MCP) over a model surface consisting of 5% CuO/Silica. The PCDD to PCDF ratio was found to be strongly dependent on the ratio of chlorinated benzenes to chlorinated phenols and oxygen content. The higher the 1,2-DCBz to 2-MCP ratio, the lower the PCDD to PCDF ratio. PCDFs are formed predominantly from chlorinated benzenes, while chlorinated phenols are responsible for majority of PCDDs. These laboratory results are in general agreement with full-scale measurement and can be used to improve predictive models of PCDD/F formation.
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spelling pubmed-42556592015-11-05 PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface Nganai, Shadrack Dellinger, Barry Lomnicki, Slawo Environ Sci Technol [Image: see text] The discrepancies between polychlorinated dibenzo-p-dioxin to polychlorinated dibenzofuran (PCDD to PCDF) ratios in laboratory and field studies in the exhaust of combustion sources are not fully explained by available formation models. In this paper we present the results of experimental studies of the surface mediated formation of PCDD/F at the conditions mimicking the combustion cool zone from a mixture of 1,2-dichlorobenzene (1,2-DCBz) and 2-monochlorophenol (2-MCP) over a model surface consisting of 5% CuO/Silica. The PCDD to PCDF ratio was found to be strongly dependent on the ratio of chlorinated benzenes to chlorinated phenols and oxygen content. The higher the 1,2-DCBz to 2-MCP ratio, the lower the PCDD to PCDF ratio. PCDFs are formed predominantly from chlorinated benzenes, while chlorinated phenols are responsible for majority of PCDDs. These laboratory results are in general agreement with full-scale measurement and can be used to improve predictive models of PCDD/F formation. American Chemical Society 2014-11-05 2014-12-02 /pmc/articles/PMC4255659/ /pubmed/25372621 http://dx.doi.org/10.1021/es504253w Text en Copyright © 2014 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Nganai, Shadrack
Dellinger, Barry
Lomnicki, Slawo
PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface
title PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface
title_full PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface
title_fullStr PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface
title_full_unstemmed PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface
title_short PCDD/PCDF Ratio in the Precursor Formation Model over CuO Surface
title_sort pcdd/pcdf ratio in the precursor formation model over cuo surface
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4255659/
https://www.ncbi.nlm.nih.gov/pubmed/25372621
http://dx.doi.org/10.1021/es504253w
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