| Discovery of significant atmospheric emission of halogenated polycyclic aromatic hydrocarbons from secondary zinc smelting | |
Yang, Yuanping; Liu, Guorui ; Zheng, Minghui; Liu, Shuting; Yang, Qiuting; Liu, Xiaoyun; Wang, Mingxuan; Yang, Lili
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| 2022-06-15 | |
| Source Publication | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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| ISSN | 0147-6513 |
| Volume | 238Issue:0Pages:113594 |
| Abstract | Chlorinated and brominated polycyclic aromatic hydrocarbons (Cl/Br-PAHs) are emerging persistent organic pollutants. Current knowledge on the emissions of Cl/Br- PAHs is far insufficient for source control, much less on their formation mechanisms. In this field study, Cl/Br-PAHs formation mechanisms were proposed from the macro perspective of practical secondary metal smelting industries. We found secondary zinc smelting as a significant source of Cl/Br-PAHs (9553 ng/m(3) in stack gas), exceeding concentrations from other metal smelting sources by 1-2 orders of magnitude. Cl/Br-PAH emission characteristics differed between various secondary metal smelting processes, indicating dominance of different formation mechanisms. Cl/Br-PAHs with fewer rings were dominant from secondary zinc smelting and secondary copper smelting. Differently, emissions from secondary aluminum smelting were dominated by congeners with more rings. The differences in congener profiles were attributable to the catalytic effects of metal compounds during smelting activities. Zinc oxide and copper oxide dominantly catalyzed dehydrogenation reactions, contributing to the formation of intermediate radicals and subsequent dimerization to Cl/Br-PAHs with fewer rings. Differently, aluminum oxide induced alkylation reactions and accelerated ring growth, resulting in the formation of Cl-PAHs with more rings. The newly proposed mechanisms can successfully explain the emission characteristics of Cl/Br-PAHs during smelting activities, which should be important implication for Cl/Br-PAHs targeted source control. |
| Department | 环境化学与生态毒理学国家重点实验室 ; 环境化学与生态毒理学国家重点实验室 |
| Keyword | PERSISTENT FREE-RADICALS FLY-ASH SAMPLES POLYCHLORINATED-BIPHENYLS IDENTIFICATION RISKS |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47507 |
| Collection | 环境化学与生态毒理学国家重点实验室 |
| Corresponding Author | Yang, Lili |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Jianghan Univ, Hubei Key Lab Ind Fume & Dust Pollut Control, Wuhan 430056, Peoples R China 4.Minist Ecol & Environm Peoples Republ China, Ctr Ecoenvironm Monitoring & Sci Res, Adm Ecol & Environm Haihe River Basin & Beihai Se, Tianjin 300170, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Yuanping,Liu, Guorui,Zheng, Minghui,et al. Discovery of significant atmospheric emission of halogenated polycyclic aromatic hydrocarbons from secondary zinc smelting[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2022,238(0):113594. |
| APA | Yang, Yuanping.,Liu, Guorui.,Zheng, Minghui.,Liu, Shuting.,Yang, Qiuting.,...&Yang, Lili.(2022).Discovery of significant atmospheric emission of halogenated polycyclic aromatic hydrocarbons from secondary zinc smelting.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,238(0),113594. |
| MLA | Yang, Yuanping,et al."Discovery of significant atmospheric emission of halogenated polycyclic aromatic hydrocarbons from secondary zinc smelting".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 238.0(2022):113594. |
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