洞庭湖不同营养级鱼组织中PCBs的分布特征

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Abstract

The toxicity of polychlorinated biphenyls (PCBs) and their transformation have been intensively investigated in recent years. However, the potential mechanisms of biotransformation in a lake food web remain unclear. In current study, the distribution characteristics of PCBs and δ¹⁵N values in different tissues of six species of fishes, collected in Dongting Lake, were analysed with gas chromatography-high resolution mass spectrometer and stable isotope mass spectrometer, respectively. The correlation between PCBs and the trophic level were explored based on the concentrations and δ¹⁵N values. The concentration of ∑PCBs₁₁₅ranged from 0.04 to 9.77ng/g wet weight (ww), and the highest level was found in the gonad of Cyprinus carpio. The concentration of toxicity equivalent (TEQ) varied from 0.003 to 2.39pg/g, with highest level detected in the fat of Silurus asotus. And the PCB levels in fish collected from Dongting Lake were at low level comparing with previous study. PCB28, 52, 95, 99, 101, 105, 110, 118, 138, 153, 155 and 209 were found in all tissues. The coplanar PCBs (Co-PCBs), Ind-PCBs (Indicator PCBs) and PCB209 was in a tissue-specific manner. The significant positive correlation (P<0.05) between the PCB congeners and δ¹⁵N values varied depending on the calculation mode of PCB concentrations (such as, ng/g ww, ng/g dry weight and lipid- normalized).

Key words： different tissues PCBs content trophic level distribution characteristics correlation analysis

Received: 26 November 2018

PACS:

X503.225

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	Articles by authors
	GE Fang-fang
	FU Qing
	ZHANG Ke-xin
	ZHAO Xing-ru
	JIN Xiao-ling
	WANG Xing
	GUO Rui
	AN Li-hui
	LIU Yan
	QIAO Xiao-cui
	ZHENG Xue-zhong

Cite this article:

GE Fang-fang,FU Qing,ZHANG Ke-xin等. Characteristics of PCBs in different trophic level tissues of fish from Dongting Lake[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(6): 2652-2658.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I6/2652

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