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Thermal reaction characteristics of dioxins on cement kiln dust

Cement kiln dust is commonly recycled back into the production process. This results in elevated concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the flue gases of cement plants. The present study investigated the effects the reaction temperature, oxygen content, an...

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Autores principales: Zhan, Ming-Xiu, Pan, Shuping, Deviatkin, Ivan, Chen, Tong, Li, Xiao-Dong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9077670/
https://www.ncbi.nlm.nih.gov/pubmed/35542941
http://dx.doi.org/10.1039/c7ra09220b
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author Zhan, Ming-Xiu
Pan, Shuping
Deviatkin, Ivan
Chen, Tong
Li, Xiao-Dong
author_facet Zhan, Ming-Xiu
Pan, Shuping
Deviatkin, Ivan
Chen, Tong
Li, Xiao-Dong
author_sort Zhan, Ming-Xiu
collection PubMed
description Cement kiln dust is commonly recycled back into the production process. This results in elevated concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the flue gases of cement plants. The present study investigated the effects the reaction temperature, oxygen content, and origin of kiln dust had on the thermal reaction characteristics of PCDD/Fs. The concentration of 2,3,7,8-PCDD/Fs that were desorbed from the kiln dust decreased as the reaction temperature was increased and the higher temperature facilitated the degradation of PCDD/Fs. However, the oxygen content, which ranged from 6–21%, had only a minor impact on the thermal reaction characteristics of PCDD/Fs. Finally, the thermal reaction characteristics of PCDD/Fs were largely affected by the origin of the kiln dust; 1.2 pg I-TEQ g(−1) was desorbed from kiln dust originating from a cement plant that co-processed refuse-derived fuel (RDF) and 47.5 pg I-TEQ g(−1) was desorbed from kiln dust originating from a cement plant that co-processed hazardous waste. The study also found that PCDD/F formation pathways were dependent on the origin of the kiln dust; precursor synthesis dominated PCDD/F formation on the kiln dust collected from a cement plant that co-processed RDF, while de novo synthesis dominated the formation of PCDD/Fs on the remaining samples of kiln dust.
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spelling pubmed-90776702022-05-09 Thermal reaction characteristics of dioxins on cement kiln dust Zhan, Ming-Xiu Pan, Shuping Deviatkin, Ivan Chen, Tong Li, Xiao-Dong RSC Adv Chemistry Cement kiln dust is commonly recycled back into the production process. This results in elevated concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the flue gases of cement plants. The present study investigated the effects the reaction temperature, oxygen content, and origin of kiln dust had on the thermal reaction characteristics of PCDD/Fs. The concentration of 2,3,7,8-PCDD/Fs that were desorbed from the kiln dust decreased as the reaction temperature was increased and the higher temperature facilitated the degradation of PCDD/Fs. However, the oxygen content, which ranged from 6–21%, had only a minor impact on the thermal reaction characteristics of PCDD/Fs. Finally, the thermal reaction characteristics of PCDD/Fs were largely affected by the origin of the kiln dust; 1.2 pg I-TEQ g(−1) was desorbed from kiln dust originating from a cement plant that co-processed refuse-derived fuel (RDF) and 47.5 pg I-TEQ g(−1) was desorbed from kiln dust originating from a cement plant that co-processed hazardous waste. The study also found that PCDD/F formation pathways were dependent on the origin of the kiln dust; precursor synthesis dominated PCDD/F formation on the kiln dust collected from a cement plant that co-processed RDF, while de novo synthesis dominated the formation of PCDD/Fs on the remaining samples of kiln dust. The Royal Society of Chemistry 2018-01-17 /pmc/articles/PMC9077670/ /pubmed/35542941 http://dx.doi.org/10.1039/c7ra09220b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Zhan, Ming-Xiu
Pan, Shuping
Deviatkin, Ivan
Chen, Tong
Li, Xiao-Dong
Thermal reaction characteristics of dioxins on cement kiln dust
title Thermal reaction characteristics of dioxins on cement kiln dust
title_full Thermal reaction characteristics of dioxins on cement kiln dust
title_fullStr Thermal reaction characteristics of dioxins on cement kiln dust
title_full_unstemmed Thermal reaction characteristics of dioxins on cement kiln dust
title_short Thermal reaction characteristics of dioxins on cement kiln dust
title_sort thermal reaction characteristics of dioxins on cement kiln dust
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9077670/
https://www.ncbi.nlm.nih.gov/pubmed/35542941
http://dx.doi.org/10.1039/c7ra09220b
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AT deviatkinivan thermalreactioncharacteristicsofdioxinsoncementkilndust
AT chentong thermalreactioncharacteristicsofdioxinsoncementkilndust
AT lixiaodong thermalreactioncharacteristicsofdioxinsoncementkilndust