Temporal Trends and Suspect Screening of Halogenated Flame Retardants and Their Metabolites in Blubbers of Cetaceans Stranded in Hong Kong Waters during 2013-2020

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)9298–9308
Journal / PublicationEnvironmental Science & Technology
Volume57
Issue number25
Online published9 Jun 2023
Publication statusPublished - 27 Jun 2023

Link(s)

Abstract

Halogenated flame retardants (HFRs) are a large class of chemical additives intended to meet flammability safety requirements, and at present, they are ubiquitous in the environment. Herein, we conducted the target analysis and suspect screening of legacy and novel HFRs and their metabolites in the blubber of finless porpoises (Neophocaena phocaenoides; n = 70) and Indo-Pacific humpback dolphins (Sousa chinens is; n = 35) stranded in Hong Kong, a coastal city in the South China Sea, between 2013 and 2020. The average concentrations of total target HFRs (sigma HFRs) were 6.48 x 103 ± 1.01 x 104 and 1.40 x 104 ± 1.51 x 104 ng/g lipid weight in porpoises and dolphins, respectively. Significant decreasing temporal trends were observed in the concentrations of tetra-/penta-/hexa-bromodiphenyl ethers (tetra-/penta-/hexa-BDEs) in adult porpoises stranded from 2013-2015 to 2016-2020 (p < 0.05), probably because of their phasing out in China. No significant difference was found for the concentrations of decabromodiphenyl ether and hexabromocyclododecane, possibly due to their exemption from the ban in China until 2025 and 2021, respectively. Eight brominated compounds were additionally identified via suspect screening. A positive correlation was found between the concentrations of tetra-BDE and methyl-methoxy-tetra-BDE (Me-MeO-tetra-BDE) (p < 0.05), indicating that the metabolism of tetra-BDEmay be a potential source of Me-MeO-tetra-BDE in marine mammals. © 2023 The Authors. Published by American Chemical Society

Research Area(s)

  • polybrominated diphenyl ethers, Me-MeO-tetra-BDE, high-resolution mass spectrometry, south china sea, marine mammal, metabolites, 2, 3-dibromopropyl-2, 4, 6-tribromophenylether, biomonitor, BOTTLE-NOSED DOLPHINS, POLYBROMINATED DIPHENYL ETHERS, RESOLUTION MASS-SPECTROMETRY, ORGANIC-COMPOUNDS, MARINE MAMMALS, BROMINATED COMPOUNDS, TURSIOPS-TRUNCATUS, FRESH-WATER, PBDES, IDENTIFICATION

Citation Format(s)

Temporal Trends and Suspect Screening of Halogenated Flame Retardants and Their Metabolites in Blubbers of Cetaceans Stranded in Hong Kong Waters during 2013-2020. / Wang, Qi; Ruan, Yuefei; Jin, Linjie et al.
In: Environmental Science & Technology, Vol. 57, No. 25, 27.06.2023, p. 9298–9308.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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