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首页> 外文期刊>Environmental toxicology and chemistry >JOINT TOXICITY OF A PYRETHROID INSECTICIDE, CYPERMETHRIN, AND A HEAVY METAL, LEAD, TO THE BENTHIC INVERTEBRATE CHIRONOMUS DILUTUS
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JOINT TOXICITY OF A PYRETHROID INSECTICIDE, CYPERMETHRIN, AND A HEAVY METAL, LEAD, TO THE BENTHIC INVERTEBRATE CHIRONOMUS DILUTUS

机译：拟除虫菊酯，氯氰菊酯和重金属铅对底栖无脊椎动物CHIRONOMUS DILUTUS的联合毒性

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摘要

Insecticides and heavy metals are frequently detected in the environment, but few studies have assessed the joint toxicity of organic and inorganic contaminants. Joint toxicity of a pyrethroid insecticide, cypermethrin, and a heavy metal, Pb~(2+), was evaluated in the present study. An antagonistic toxic response was observed when the benthic invertebrate Chironomus dilutus was simultaneously exposed to the two contaminants in both water and sediment exposures. Pre-exposure bioassays with midges were also conducted, and toxicity of cypermethrin was significantly reduced for midges that were pre-exposed to Pb~(2+). In addition, the impact of Pb~(2+) on the bioavailability of cypermethrin to midges was measured using Tenax extraction. No significant difference was noted in the amount of Tenax-extractable cypermethrin when different amounts of Pb~(2+) were added to sediment. Results suggested that altered organism sensitivity may contribute to the observed antagonistic interaction between cypermethrin and Pb~(2+), whereas the influence of changes in toxicokinetic processes such as uptake, biotransformation, and elimination on the joint toxicity should be further studied. Finally, the decreased toxicity of cypermethrin when simultaneously applied with Pb~(2+) may be one reason for the overestimation of sediment toxicity by cypermethrin alone in field-collected sediment.
机译：在环境中经常检测到杀虫剂和重金属，但很少有研究评估有机和无机污染物的联合毒性。在本研究中评估了拟除虫菊酯杀虫剂氯氰菊酯和重金属Pb〜（2+）的联合毒性。当底栖无脊椎动物Chironomus dilutus同时暴露于水和沉积物暴露中的两种污染物时，观察到拮抗毒性反应。还进行了带有mid的暴露前生物测定，对于预先暴露于Pb〜（2+）的mid，氯氰菊酯的毒性显着降低。此外，使用Tenax提取法测定了Pb〜（2+）对氯氰菊酯对mid的生物利用度的影响。当向沉积物中添加不同量的Pb〜（2+）时，Tenax可提取的氯氰菊酯的量没有显着差异。结果表明，改变的生物敏感性可能有助于观察到的氯氰菊酯与Pb〜（2+）之间的拮抗作用，而毒代动力学过程的变化（如摄取，生物转化和消除）对关节毒性的影响应进一步研究。最后，氯氰菊酯与Pb〜（2+）并用时毒性降低，可能是单独使用氯氰菊酯高估了现场收集沉积物中沉积物毒性的原因之一。

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  • 来源
    《Environmental toxicology and chemistry》 |2011年第12期|p.2838-2845|共8页
  • 作者

    W. Tyler MEHLER; Juan Du; Michael J. Lydy; Jing You;

  • 作者单位

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China,Fisheries and Illinois Aquaculture Center and Department of Zoology, Southern Illinois University, Carbondale, Illinois, USA;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China,Graduate School of the Chinese Academy of Sciences, Beijing, China;

    Fisheries and Illinois Aquaculture Center and Department of Zoology, Southern Illinois University, Carbondale, Illinois, USA;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China;

  • 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

    joint toxicity; cypermethrin; lead; antagonism; chironomus dilutus;

    机译：联合毒性;氯氰菊酯铅;对抗;稀释的Chironomus;

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