Bioaccumulation, Trophic Transfer, and Biotransformation of Polychlorinated Diphenyl Ethers in a Simulated Aquatic Food Chain

Xuesheng Zhang; Wenli Xiong; Qiuxuan Wu

首页> 外文期刊>Environmental Science & Technology: ES&T >Bioaccumulation, Trophic Transfer, and Biotransformation of Polychlorinated Diphenyl Ethers in a Simulated Aquatic Food Chain

【24h】

Bioaccumulation, Trophic Transfer, and Biotransformation of Polychlorinated Diphenyl Ethers in a Simulated Aquatic Food Chain

机译：Bioaccumulation, Trophic Transfer, and Biotransformation of Polychlorinated Diphenyl Ethers in a Simulated Aquatic Food Chain

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Polychlorinated diphenyl ethers (PCDEs) are detected in aquatic environments and demonstrate adverse effects in aquatic organisms.However, data regarding the environmental behavior of PCDEs in aquatic ecosystems are lacking.In the present study, a simulated aquatic food chain (Scenedesmus obliquus— Daphnia magna—Danio rerio) was constructed in a lab setting, and the bioaccumulation, trophic transfer, and biotransformation of 12 PCDE congeners were quantitatively investigated for the first time.The log-transformed bioaccumulation factors (BCFs) of PCDEs in S.obliquus, D.magna, and D, rerio were in the range of 2.94—3.77, 3.29—4.03, and 2.42—2.89 L/kg w.w., respectively, indicating the species-specific bioaccumulation of PCDE congeners.The BCF values increased significantly with the increasing number of substituted CI atoms, with the exception of CDE 209.The number of CI atoms at the para and meta positions were found to be the major positive contributing factors for BCFs in the case of the same number of substituted CI.The lipid-normalized biomagnification factors (BMFs) of S.obliquus to D.magna, D.magna to D.rerio, and the whole food chain for the 12 PCDE congeners ranged at 1.08—2.27, 0.81 — 1.64, and 0.88-3.64, respectively, suggesting that some congeners had BMFs comparable to PBDEs and PCBs.Dechlorination was the only metabolic pathway observed for S.obliquus and D.magna.For D.rerio, dechlorination, methoxylation, and hydroxylation metabolic pathways were observed.H nuclear magnetic resonance (NMR) experiments and theoretical calculations confirmed that methoxylation and hydroxylation occurred at the ortho position of the benzene rings.In addition, reliable quantitative structure—property relationship (QSPR) models were constructed to qualitatively describe the relationships between molecular structure descriptors and BCFs for PCDEs.These findings provide insights into the movement and transformation of PCDEs in aquatic ecosystems.

著录项

来源
《Environmental Science & Technology: ES&T》 |2023年第14期|5751-5760|共10页
作者
Xuesheng Zhang; Wenli Xiong; Qiuxuan Wu;
展开▼
作者单位

School of Resources and Environmental Engineering and Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, Anhui 230601, China;

School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
PCDEs; species/congener-specific properties; mimic aquatic ecosystem; trophodynamics; metabolism;

Bioaccumulation, Trophic Transfer, and Biotransformation of Polychlorinated Diphenyl Ethers in a Simulated Aquatic Food Chain

摘要

著录项

相关主题

期刊订阅