Novel brominated flame retardants in West Antarctic atmosphere (2011-2018): Temporal trends, sources and chiral signature
文献类型：期刊论文
| 作者 | Zhao, Junpeng; Wang, Pu; Wang, Chu; Fu, Min; Li, Yingming; Yang, Ruiqiang; Fu, Jianjie ; Hao, Yanfen; Matsiko, Julius; Zhang, Qinghua
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2020-06-10 |
| 卷号 | 720页码:1-10 |
| 关键词 | NBFRs Antarctica Long-range atmospheric transport Gas/particle partitioning |
| ISSN号 | 0048-9697 |
| 英文摘要 | Novel brominated flame retardants (NBFRs) were comprehensively investigated in both gaseous and particle phase samples collected using a high-volume active air sampler (HV-AAS) at the Chinese Great Wall Station in King George Island, West Antarctica from 2011 to 2018. The concentrations of Sigma(12)NBFRs ranged from 0.27 to 3.0 pg m(-3), with a mean value of 1.1 +/- 0.50 pg m(-3) and the levels showed a slightly increasing trend over the eight years. Decabromodiphenyl ethane (DBDPE) was the predominant NBFR with a relative contribution of 50% on average. Most of the studied NBFRs tended to distribute in gaseous phase with an average ratio of 72 +/- 16% while NBFRs with higher log K-OA values had higher proportions in particle phase. The gas/particle partitioning models were employed to evaluate the environmental behavior of NBFRs. Compared to the equilibrium-state-based model, the steady-state-based model performed much better to predict the gas/particle partitioning of NBFRs in the West Antarctic atmosphere. Additionally, no temperature dependence was found for NBFRs except rac-(1R,2R,5R,6R)-1,2,5,6-tetrabromocyclooctane (beta-TBCO). The annual mean concentrations of Sigma(12)NBFRs showed a significantly negative correlation with the frequency of east-southeast (ESE, 112.5 degrees) wind and calm wind (similar to 0 m s(-1)) (p < 0.05), and a significantly positive correlation with the frequency of wind from northwest interval (west to north-northwest, 270 degrees to 337.5 degrees) (p < 0.05), suggesting a significant effect of air mass from the ocean area. Furthermore, the chiral signature of NBFRs showed commonly non-racemic residue in the atmosphere. The enantiomer fractions (EF) of rac-(1R,2R)-1,2-dibromo-(4S)-4-((1R)-1,2-dibromoethly) cyclohexane (alpha-TBECH) and beta-TBCO were 0.115-0.962 and 0.281-0.795, revealing secondary sources of NBFRs, e.g., seawater-air exchange and/or non-racemic residue in the source regions. As far as we know, this is one of very few studies on NBFRs in the Antarctic atmosphere. (C) 2020 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44751]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhao, Junpeng,Wang, Pu,Wang, Chu,et al. Novel brominated flame retardants in West Antarctic atmosphere (2011-2018): Temporal trends, sources and chiral signature[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,720:1-10. |
| APA | Zhao, Junpeng.,Wang, Pu.,Wang, Chu.,Fu, Min.,Li, Yingming.,...&Jiang, Guibin.(2020).Novel brominated flame retardants in West Antarctic atmosphere (2011-2018): Temporal trends, sources and chiral signature.SCIENCE OF THE TOTAL ENVIRONMENT,720,1-10. |
| MLA | Zhao, Junpeng,et al."Novel brominated flame retardants in West Antarctic atmosphere (2011-2018): Temporal trends, sources and chiral signature".SCIENCE OF THE TOTAL ENVIRONMENT 720(2020):1-10. |
入库方式： OAI收割
来源：生态环境研究中心
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