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首页> 外文期刊>Environmental toxicology and chemistry >ANALYSIS, OCCURRENCE, AND TOXIC POTENTIAL OF PYRETHROIDS, AND FIPRONIL IN SEDIMENTS FROM AN URBAN ESTUARY
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ANALYSIS, OCCURRENCE, AND TOXIC POTENTIAL OF PYRETHROIDS, AND FIPRONIL IN SEDIMENTS FROM AN URBAN ESTUARY

机译：市区河口沉积物中拟除虫菊酯和鱼类的分析，发生和毒性潜力

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摘要

Eight pyrethroids and fipronil and its three major degradates were analyzed in urban estuarine sediments that exhibited a range of toxic effects to an amphipod test species. Sediments from Ballona Creek, an urban estuary in Southern California (USA), collected during three dry season events were analyzed by gas chromatography with electron capture and negative chemical ionization mass spectrometric detection (GC-ECD and GC-NCI-MS). The two detection methods were in agreement for intermediate levels of pyrethroid contamination (10-50 ng/g dry wt) but deviated for both low and high concentrations (< 5 and > 50ng/g). Sediments contained total pyrethroids as high as 473 ng/g with permethrin, bifenthrin, and cypermethrin as the most abundant compounds. In contrast, fipronil and its desulfinyl, sulfide, and sulfone degradates were detected at much lower levels (≤ 0.18-16 ng/g). Toxic units estimated for these compounds revealed that bifenthrin and cypermethrin were likely contributors to the mortality observed in tests with the estuarine amphipod Eohaustorius estuarius. Although fipronil was not a likely contributor to the observed mortality, the concentrations detected may be of concern for more sensitive crustacean species. Furthermore, the spatial pattern of pyrethroid contamination and potential toxicity was highly correlated with fine-grained substrate, which shifted to downstream stations within a three-month period during the dry season.
机译：在城市河口沉积物中分析了八种拟除虫菊酯和氟虫腈及其三个主要降解物，这些沉积物对两栖类受试物种表现出一系列毒性作用。通过气相色谱-电子捕获和负化学电离质谱检测（GC-ECD和GC-NCI-MS），分析了三个干旱季节事件中从南加州（美国）城市河口Ballona Creek收集的沉积物。两种检测方法均符合拟除虫菊酯污染的中间水平（10-50 ng / g干重），但对于低浓度和高浓度（<5和> 50ng / g）均存在偏差。沉积物中的拟除虫菊酯含量最高为473 ng / g，其中氯菊酯，联苯菊酯和氯氰菊酯为最丰富的化合物。相反，检测到的氟虫腈及其去亚磺酰基，硫化物和砜的降解物含量要低得多（≤0.18-16 ng / g）。估计这些化合物的有毒单位表明，联苯菊酯和氯氰菊酯可能是造成河口两栖动物Eohaustorius estuarius测试中观察到的死亡率的原因。尽管氟虫腈可能不是导致观察到的死亡率的原因，但检测到的浓度可能与更敏感的甲壳类有关。此外，拟除虫菊酯污染和潜在毒性的空间格局与细颗粒底物高度相关，后者在干旱季节的三个月内转移到下游站。

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  • 来源
    《Environmental toxicology and chemistry》 |2010年第4期|p.843-851|共9页
  • 作者

    Wenjian Lao; David Tsukada; Darrin J. Greenstein; Steven M. Bay; Keith A. Maruya;

  • 作者单位

    Southern California Coastal Water Research Project, 3535 Harbor Boulevard Suite 110, Costa Mesa, California 92626, USA;

    Southern California Coastal Water Research Project, 3535 Harbor Boulevard Suite 110, Costa Mesa, California 92626, USA;

    Southern California Coastal Water Research Project, 3535 Harbor Boulevard Suite 110, Costa Mesa, California 92626, USA;

    Southern California Coastal Water Research Project, 3535 Harbor Boulevard Suite 110, Costa Mesa, California 92626, USA;

    Southern California Coastal Water Research Project, 3535 Harbor Boulevard Suite 110, Costa Mesa, California 92626, USA;

  • 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 eng
  • 中图分类
  • 关键词

    pyrethroids; fipronil; sediment toxicity; estuarine sediment; toxicant identification;

    机译：拟除虫菊酯;氟虫腈沉积物毒性河口沉积物;毒物鉴定;

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