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Emissions of 2,3,7,8-substituted and non-2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans from secondary aluminum smelters
Li, Haifeng; Liu, Wenbin; Tang, Chen; Lei, Rongrong; Wu, Xiaolin; Gao, Lirong; Su, Guijin
2019
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume215Pages:92-100
AbstractThe secondary aluminum smelting industry is an important source of polychlorinated dibenzo-p-dioxin and dibenzofurans (PCDD/Fs). However, the formations and emissions of non-2,3,7,8-PCDD/Fs have rarely been studied. Non-2,3,7,8-PCDD/Fs may also be metabolically toxic to mammalians. In this study, four typical secondary aluminum smelters were selected as demonstration smelters and the composition of the raw material they used was adjusted to investigate the influence on PCDD/F emissions and profiles. In addition to 17 congeners of 2,3,7,8-PCDD/Fs, 64 congeners of non-2,3,7,8-PCDD/Fs were firstly reported. Strong, positive correlations were found between non-2,3,7,8-PCDD/Fs and 2,3,7,8-PCDD/Fs. The concentrations of 2,3,7,8-PCDD/Fs in stack gas and fly ash samples were 120.7-870.4 pg/Nm(3) and 13.40 -292.9 ng/g, respectively. Those of non-2,3,7,8-PCDD/Fs in the stack gas and fly ash samples were 84.03 -1183.7 pg/Nm(3) and 7.20-344.7 ng/g, respectively. The raw material composition was a key factor affecting PCDD/F emissions and profiles. An analysis of Gibbs free energies (Delta G(f)) showed that non-2,3,7,8-PCDD/Fs could be transformed into 2,3,7,8-PCDD/Fs, which would increase the PCDD/F environmental risks. The emission inventories of 2,3,7,8-PCDD/Fs, non-2,3,7,8-PCDD/Fs, and International Toxic Equivalents from Chinese secondary aluminum smelters in 2013 were 8247 g, 7253 g, and 608.6 g, respectively. The results of this study could contribute to potential risk evaluations and effective reduction of non-2,3,7,8-PCDD/Fs. (C) 2018 Elsevier Ltd. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
KeywordNon-2,3,7,8-PCDD/Fs Secondary aluminum smelting Raw material Emission inventory
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/42940
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Haifeng,Liu, Wenbin,Tang, Chen,et al. Emissions of 2,3,7,8-substituted and non-2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans from secondary aluminum smelters[J]. CHEMOSPHERE,2019,215:92-100.
APA Li, Haifeng.,Liu, Wenbin.,Tang, Chen.,Lei, Rongrong.,Wu, Xiaolin.,...&Su, Guijin.(2019).Emissions of 2,3,7,8-substituted and non-2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans from secondary aluminum smelters.CHEMOSPHERE,215,92-100.
MLA Li, Haifeng,et al."Emissions of 2,3,7,8-substituted and non-2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans from secondary aluminum smelters".CHEMOSPHERE 215(2019):92-100.
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