Sediment contamination with polybrominated diphenyl ethers and alternative brominated flame retardants: case study in urban lakes of Hanoi, Vietnam

• Published in: Environmental science and pollution research international 2023-03, Vol.30 (11), p.31436-31445
• Main Authors: Hoang, Anh Quoc, Duong, Hanh Thi, Trinh, Ha Thu, Kadokami, Kiwao, Takahashi, Shin
• Format: Article
• Language: English
• Subjects: Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental Monitoring; Flame Retardants - analysis; Halogenated Diphenyl Ethers - analysis; Lakes; Research Article; Vietnam; Waste Water Technology; Water Management; Water Pollution Control
• ISSN: 1614-7499; 1614-7499
• DOI: 10.1007/s11356-022-24393-8

Information regarding the contamination of brominated flame retardants (BFRs) in lake sediments from Vietnam and Southeast Asia is still very limited. To fill such knowledge gaps, surface sediment samples from five urban lakes in Hanoi, Vietnam, were analyzed for polybrominated diphenyl ethers (PBDEs) and some other BFRs. Concentrations of total PBDEs ranged from 1.1 to 26 (median 6.6) ng/g dry weight with the most predominant congeners as BDE-209 (62 ± 17%), BDE-99 (10 ± 8%), and BDE-47 (6 ± 5%). Concentrations of other BFRs decreased in the order: decabromodiphenyl ethane (DBDPE) > 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE) > hexabromobiphenyl (BB-153) > pentabromoethylbenzene (PBEB), which were about one to two orders of magnitude lower than PBDEs. BDE-209 and DBDPE were highly correlated (Pearson’s r  = 0.879; p