期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 97, 期 -, 页码 194-199出版社
SCIENCE PRESS
DOI: 10.1016/j.jes.2020.04.021
关键词
Polycyclic aromatic hydrocarbons; Arctic shelf; Benthos; Toxic potency; Bioaccumulation
资金
- National Natural Science Foundation of China [41506215, 41976211]
- Shanghai Pujiang Talent Program [19PJ1404200]
Eighteen polycyclic aromatic hydrocarbons (PAHs) were detected in benthos collected on-board the 'Snow Dragon' in the Northern Bering Sea Shelf and Chukchi Sea Shelf during the 6th Chinese National Arctic Research Expedition (CHINARE 2014). Sigma(18)PAHs for all biota samples ranged from 34.2 to 128.1 ng/g dry weight (dw), with the highest concentration observed in fish muscle (Boreogadus saida) samples close to St. Lawrence Island. The PAH composition pattern was dominated by the presence of lighter 3 ring (57%) and 2 ring (28%) PAHs, indicating oil-related or petrogenic sources as important origins of PAH contamination. Concentrations of alkyl-PAHs (1-methylnaphthalene and 2-methylnaphthalene) were lower than their parent PAH (naphthalene) in all biological tissue, and their percentage also decreased significantly (p < 0.05) compared with those in the corresponding sediment. There were no significant relationships between PAH concentrations and trophic levels, which is possibly due to the combined results of the complex benthic foodweb in the subarctic/Arctic shelf region, as well as a low assimilation/effective metabolism for PAHs. According to toxic potency evaluation results from TCDD toxic equivalents (TEQs) and BaP-equivalent (BaPE) values, whelk (Neptunea heros) and starfish (Ctenodiscus crispatus) are two macroinvertebrate species showing relatively higher dioxin-like toxicity and carcinogenic risk. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据