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Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators

Comprehensive diagnosis of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) emissions was systematically conducted on three hazardous waste incinerators (HWIs). Results indicated that PCDD/F mainly existed in the solid phase before the bag filter. This was especially true for higher chlori...

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Autores principales: Cao, Xuan, Ji, Longjie, Lin, Xiaoqing, Stevens, William R., Tang, Minghui, Shang, Fanjie, Tang, Shaofu, Lu, Shengyong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6083712/
https://www.ncbi.nlm.nih.gov/pubmed/30109050
http://dx.doi.org/10.1098/rsos.172056
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author Cao, Xuan
Ji, Longjie
Lin, Xiaoqing
Stevens, William R.
Tang, Minghui
Shang, Fanjie
Tang, Shaofu
Lu, Shengyong
author_facet Cao, Xuan
Ji, Longjie
Lin, Xiaoqing
Stevens, William R.
Tang, Minghui
Shang, Fanjie
Tang, Shaofu
Lu, Shengyong
author_sort Cao, Xuan
collection PubMed
description Comprehensive diagnosis of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) emissions was systematically conducted on three hazardous waste incinerators (HWIs). Results indicated that PCDD/F mainly existed in the solid phase before the bag filter. This was especially true for higher chlorinated dioxin and furan congeners (hexa-, hepta- and octa-). The aged bag filters tended to increase the gas-phase PCDD/F. Emissions also increased due to PCDD/F desorption from circulated scrubbing solution and plastic packing media used in the wet scrubber. The PCDD/F concentrations were elevated during the start-up process, reaching up to 5.4 times higher than those measured during the normal operating period. The ratios of PCDFs/PCDDs revealed that the surface-catalysed de novo synthesis was the dominant pathway of PCDD/F formation. Installation of more efficient fabric filters, intermittent replacement of circulated scrubbing solution will result in reduced PCDD/F emission. Additionally, 2,3,4,7,8-PeCDF correlated well with the international toxic equivalent quantity (I-TEQ) value, which suggests that 2,3,4,7,8-PeCDF could act as an I-TEQ indicator.
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spelling pubmed-60837122018-08-14 Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators Cao, Xuan Ji, Longjie Lin, Xiaoqing Stevens, William R. Tang, Minghui Shang, Fanjie Tang, Shaofu Lu, Shengyong R Soc Open Sci Chemistry Comprehensive diagnosis of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) emissions was systematically conducted on three hazardous waste incinerators (HWIs). Results indicated that PCDD/F mainly existed in the solid phase before the bag filter. This was especially true for higher chlorinated dioxin and furan congeners (hexa-, hepta- and octa-). The aged bag filters tended to increase the gas-phase PCDD/F. Emissions also increased due to PCDD/F desorption from circulated scrubbing solution and plastic packing media used in the wet scrubber. The PCDD/F concentrations were elevated during the start-up process, reaching up to 5.4 times higher than those measured during the normal operating period. The ratios of PCDFs/PCDDs revealed that the surface-catalysed de novo synthesis was the dominant pathway of PCDD/F formation. Installation of more efficient fabric filters, intermittent replacement of circulated scrubbing solution will result in reduced PCDD/F emission. Additionally, 2,3,4,7,8-PeCDF correlated well with the international toxic equivalent quantity (I-TEQ) value, which suggests that 2,3,4,7,8-PeCDF could act as an I-TEQ indicator. The Royal Society Publishing 2018-07-11 /pmc/articles/PMC6083712/ /pubmed/30109050 http://dx.doi.org/10.1098/rsos.172056 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Cao, Xuan
Ji, Longjie
Lin, Xiaoqing
Stevens, William R.
Tang, Minghui
Shang, Fanjie
Tang, Shaofu
Lu, Shengyong
Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators
title Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators
title_full Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators
title_fullStr Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators
title_full_unstemmed Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators
title_short Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators
title_sort comprehensive diagnosis of pcdd/f emission from three hazardous waste incinerators
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6083712/
https://www.ncbi.nlm.nih.gov/pubmed/30109050
http://dx.doi.org/10.1098/rsos.172056
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