Novel brominated flame retardants in West Antarctic atmosphere (2011-2018): Temporal trends, sources and chiral signature

The Science of the Total Environment
Junpeng ZhaoGuibin Jiang

Abstract

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 ∑12NBFRs 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 KOA 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 (β-TBCO). The annual mean concentrations of ∑12NBFRs showed a significantly negative correlation with the frequency of eas...Continue Reading

Citations

Mar 7, 2021·The Science of the Total Environment·Yingjun WangGuibin Jiang
Mar 24, 2021·Environmental Science & Technology·Shizhen ZhaoGan Zhang
Oct 18, 2020·Environmental Research·Simonetta CorsoliniKarla Pozo
May 24, 2021·Environmental Pollution·Annekatrin DreyerJan Koschorreck

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