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首页> 外文期刊>Environmental toxicology and chemistry >BIOAVAILABILITY ASSESSMENT OF A CONTAMINATED FIELD SEDIMENT FROM PATRICK BAYOU, TEXAS, USA: TOXICITY IDENTIFICATION EVALUATION AND EQUILIBRIUM PARTITIONING
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BIOAVAILABILITY ASSESSMENT OF A CONTAMINATED FIELD SEDIMENT FROM PATRICK BAYOU, TEXAS, USA: TOXICITY IDENTIFICATION EVALUATION AND EQUILIBRIUM PARTITIONING

机译：来自美国得克萨斯州帕特里克·巴尤（Patrick Bayou）的污染田间沉积物的生物利用度评估：毒性鉴定和平衡分配

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摘要

Contaminated sediments are commonly found in urbanized harbors. At sufficiently high contaminant levels, sediments can cause toxicity to aquatic organisms and impair benthic communities. As a result, remediation is necessary and diagnosing the cause of sediment toxicity becomes imperative. In the present study, six sediments from a highly industrialized area in Patrick Bayou (TX, USA) were subjected to initial toxicity testing with the mysid, Americamysis bahia, and the amphipod, Ampelisca abdita. All sediments were toxic to the amphipods, while sites PB4A, PB6A, and PB9 were the only sites toxic to mysids. Due to its toxicity to both test organisms, site PB6A was chosen for a marine whole sediment phase I toxicity identification evaluation (TIE). Results of the TIE found toxicity to amphipods was primarily due to nonionic organic contaminants (NOCs), rather than cationic metals or ammonia. Causes of mysid toxicity in the TIE were less clear. An assessment of metal bioavailability using equilibrium partitioning (EqP) approaches supported the results of the TIE that cationic metals were not responsible for observed toxicity in PB6A for either organism. Toxic units (TU) calculated on measured concentrations of NOCs in the sediment yielded a total TU of 1.25, indicating these contaminants are contributing to the observed sediment toxicity. Using a combination of these TIE and EqP assessment tools, this investigation was capable of identifying NOCs as the likely class of contaminants causing acute toxicity to amphipods exposed to Patrick Bayou sediment. The cause of mysid toxicity was not definitively determined, but unmeasured NOCs are suspected.
机译：受污染的沉积物通常在城市化港口中发现。在足够高的污染物水平下，沉积物可能对水生生物造成毒性并损害底栖生物群落。结果，必须进行补救，并且必须对沉积物毒性的原因进行诊断。在本研究中，对来自帕特里克·巴尤（美国德克萨斯州）高度工业化地区的六种沉积物进行了初步测试，分别针对mysid（美洲）和Ampelisca abdita两栖动物。所有沉积物对两栖动物均具有毒性，而PB4A，PB6A和PB9位点是唯一对甲壳类有毒的位点。由于它对两种测试生物都具有毒性，因此选择地点PB6A进行海洋全沉积物I期毒性鉴定评估（TIE）。 TIE的结果发现，对两栖动物的毒性主要归因于非离子有机污染物（NOC），而不是阳离子金属或氨。 TIE中的类睫毛毒性的原因尚不清楚。使用平衡分配（EqP）方法进行的金属生物利用度评估支持TIE的结果，即阳离子金属对PB6A对任一生物的毒性均不负责。根据沉积物中NOC的测量浓度计算出的毒性单位（TU）得出的总TU为1.25，表明这些污染物有助于观察到的沉积物毒性。结合使用这些TIE和EqP评估工具，此调查能够将NOCs识别为可能对暴露于Patrick Bayou沉积物的两栖类动物造成急性毒性的污染物类别。尚未明确确定类mysid毒性的原因，但怀疑存在未测出的NOC。

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  • 来源
    《Environmental toxicology and chemistry》 |2010年第3期|p.742-750|共9页
  • 作者

    MONIQUE M. PERRON; ROBERT M. BURGESS; KAY T. HO; MARGUERITE C. PELLETIER; MARK G. CaNTWELL; JAMES P. SHINE;

  • 作者单位

    Harvard School of Public Health, Department of Environmental Health, 677 Huntington Avenue, Boston, Massachusetts 02115, USA;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, Rhode Island 02882;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, Rhode Island 02882;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, Rhode Island 02882;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, Rhode Island 02882;

    Harvard School of Public Health, Department of Environmental Health, 677 Huntington Avenue, Boston, Massachusetts 02115, 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

    sediment toxicity; toxicity identification evaluation; bioavailability; equilibrium partitioning;

    机译：沉积物毒性毒性鉴定评估;生物利用度均衡分配;

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