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全氟辛酸(PFOA)及其替代物全氟烷基醚羧酸(PFECAs)在沿海食物网中的营养行为。

Trophic behaviors of PFOA and its alternatives perfluoroalkyl ether carboxylic acids (PFECAs) in a coastal food web.

作者信息

Li Yanan, Yao Jingzhi, Pan Yitao, Dai Jiayin, Tang Jianhui

机构信息

CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong KeyLaboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, China; School of Resources and Environment, Taiyuan University of Science and Technology, Taiyuan 030024, China.

State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, China.

出版信息

J Hazard Mater. 2023 Jun 15;452:131353. doi: 10.1016/j.jhazmat.2023.131353. Epub 2023 Apr 3.

Abstract

With the increasing restrictions and concerns about legacy poly- and perfluoroalkyl substances (PFAS), the production and usage of alternatives, i.e., perfluoroalkyl ether carboxylic acids (PFECAs), have risen recently. However, there is a knowledge gap regarding the bioaccumulation and trophic behaviors of emerging PFECAs in coastal ecosystems. The bioaccumulation and trophodynamics of perfluorooctanoic acid (PFOA) and its substitutes (PFECAs) were investigated in Laizhou Bay, which is located downstream of a fluorochemical industrial park in China. Hexafluoropropylene oxide trimer acid (HFPO-TrA), perfluoro-2-methoxyacetic acid (PFMOAA) and PFOA constituted the dominant compounds in the ecosystem of Laizhou Bay. PFMOAA was dominant in invertebrates, whereas the long-chain PFECAs preferred to accumulate in fishes. The PFAS concentrations in carnivorous invertebrates were higher than those in filter-feeding species. Considering migration behaviors, the ∑PFAS concentrations followed the order oceanodromous fish < diadromous fish < non-migratory fish. The trophic magnification factors (TMFs) of long-chain PFECAs (HFPO-TrA, HFPO-TeA and PFO5DoA) were >1, suggesting trophic magnification potential, while biodilution for short-chain PFECAs (PFMOAA) was observed. The intake of PFOA in seafood may constitute a great threat to human health. More attention should be given to the impact of emerging hazardous PFAS on organisms for the health of ecosystems and human beings.

摘要

随着对传统多氟和全氟烷基物质(PFAS)的限制日益增加以及相关担忧加剧,替代物即全氟烷基醚羧酸(PFECA)的生产和使用量近来有所上升。然而,对于新兴PFECA在沿海生态系统中的生物累积和营养行为,目前存在知识空白。在中国一个氟化工产业园区下游的莱州湾,对全氟辛酸(PFOA)及其替代物(PFECA)的生物累积和营养动力学进行了研究。六氟环氧丙烷三聚体酸(HFPO-TrA)、全氟-2-甲氧基乙酸(PFMOAA)和PFOA是莱州湾生态系统中的主要化合物。PFMOAA在无脊椎动物中占主导,而长链PFECA更倾向于在鱼类中累积。肉食性无脊椎动物中的PFAS浓度高于滤食性物种。考虑到洄游行为,∑PFAS浓度呈现溯河洄游鱼类<降河洄游鱼类<非洄游鱼类的顺序。长链PFECA(HFPO-TrA、HFPO-TeA和PFO5DoA)的营养放大因子(TMF)>1,表明具有营养放大潜力,而短链PFECA(PFMOAA)则出现生物稀释现象。海鲜中PFOA的摄入可能对人类健康构成重大威胁。为了生态系统和人类的健康,应更加关注新兴有害PFAS对生物体的影响。

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