Journal
MARINE POLLUTION BULLETIN
Volume 192, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2023.114978
Keywords
Brominated flame retardants; Jiaozhou Bay; Multi-media; Source apportionment; Ecological risk assessment
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This study investigated the spatial distribution, sources, and ecological risks of PBDEs and HBCDs in Jiaozhou Bay, China. The results showed higher concentrations of PBDEs and HBCDs in the inner JZB compared to the outer JZB. PBDEs primarily originated from the production and debromination of BDE-209, as well as the emission of commercial PeBDEs, while HBCDs in sediments mostly stemmed from anthropogenic activities and river input. Overall, the study emphasizes the need for continuous monitoring and environmental management of PBDEs in JZB sediments.
Polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecanes (HBCDs) are commonly found in the environment as components of brominated flame retardants. Due to their potential impact on human health and wildlife, it is imperative to closely monitor and manage their levels in the environment. This study investigated the spatial distribution, sources, and ecological risks of PBDEs and HBCDs in Jiaozhou Bay (JZB), a large bay situated on the eastern coast of China. The results showed that PBDE concentrations ranged from not detected (ND) to 7.93 ng/L in the water and ND to 65.76 ng/g in the sediment, while HBCD concentrations ranged from ND to 0.31 ng/L in the water and ND to 16.63 ng/g in the sediment. Furthermore, we observed significantly higher concentrations of PBDEs and HBCDs in the inner JZB compared to the outer JZB. Our source appor-tionment analysis showed that PBDEs primarily originated from the production and debromination of BDE-209, as well as the emission of commercial PeBDEs, whereas HBCDs in sediments mostly stemmed from anthropogenic activities and river input. Finally, our eco-logical risk assessment highlighted the need for continuous monitoring of PBDEs in JZB sediments. Overall, our study aims to provide valuable assistance for the environmental man-agement of the JZB bay area, which is characterized by a complex net-work of rivers and a thriving economy.
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