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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2018
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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. |
format | Online Article Text |
id | pubmed-6083712 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
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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