珠江口及邻近海域表层沉积物多氯联苯分布特征

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Abstract Twenty-seven surface marine sediments were collected from Pearl River Estuary and adjacent waters in 2020 to evaluate the distribution characteristics and potential sources of polychlorinated biphenyls (PCBs). Thirty-seven PCB congeners and 10PCBs homologues including mono- to deca-PCBs were analyzed with isotope dilution HRGC/HRMS. The results show that:(1) the Σ37PCBs concentrations in the study area ranged from 0.024 to 5.11ng/g, with at least one target PCBs congeners being detected in the sediment, and was lower than that in near-shore coastal waters around the world; (2) the PCBs concentrations were higher in Zhuhai coastal waters and Humen outlet than in other study areas, particularly higher in the offshore areas, implying that they likely originated from land-based pollution sources; (3) PCB-11was the dominant compound observed in the surface sediments, with the highest detection frequency and a higher concentration than that of Σmarker PCBs; and (4) the traditional PCBs products were the main contributors to PCBs contamination only in the west coast of Shenzhen while the production and usage of diarylide yellow pigments could be the potential source of PCBs contamination in other study sites. Obviously, the contribution of marker-PCBs was limited to PCBs contamination in the PRD. Therefore, more attentions are required to control the contamination of non-Aroclor PCBs (such as PCB-11) to help regulate emerging contamintion in coastal marine environment of China.

Key words： Pearl River Estuary PCBs distribution characteristics potential sources PCB-11 diarylide yellow pigments

Received: 31 October 2022

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	HUANG Jin-qiong
	ZHANG Man-wen
	WANG Xiong
	ZHOU Chang-feng
	LIAO Hai-ting
	QING Xian
	FU Jian-ping
	WU Ming-liang
	CHEN Ming-jie
	ZHANG Su-kun

Cite this article:

HUANG Jin-qiong,ZHANG Man-wen,WANG Xiong等. Characterization and source identification of polychlorinated biphenyls (PCBs) in surface sediments of Pearl River Estuary and adjacent waters[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(5): 2460-2469.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I5/2460

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