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首页> 外文期刊>Environmental toxicology and chemistry >ENANTIOSELECTIVE TOXICITY AND DEGRADATION OF THE CHIRAL INSECTICIDE FIPRONIL IN SCENEDESMUS OBLIGUUS SUSPENSION SYSTEM
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ENANTIOSELECTIVE TOXICITY AND DEGRADATION OF THE CHIRAL INSECTICIDE FIPRONIL IN SCENEDESMUS OBLIGUUS SUSPENSION SYSTEM

机译：对映体对手性杀虫剂悬浮液中手性杀虫剂前驱物的对映选择性毒性和降解

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摘要

Fipronil is an effective insecticide, but it presents highly toxic effects in nontarget aquatic organisms. The present study examined the enantioselective toxicity and degradation of fipronil enantiomers in a freshwater algae Scenedesmus obliguus suspension. There was a substantial difference in the acute toxicity of the enantiomers to S. obliguus, with 72-h median effective concentrations (EC50s) of 0.29 mg L~(-1) and 1.50 mg L~(-1) for the R-fipronil and S-fipronil, respectively. The influences on the concentration of chlorophyll a, chlorophyll b, and carotenoids were determined, and the effects of fipronil on the concentration of chlorophyll a and chlorophyll b were also enantioselective. The degradation of fipronil in algae suspension was enantioselective, with half-lives for R-fipronil and S-fipronil of 2.9 d and 3.2 d, respectively, and the enantiomer fraction reaching 0.65 at the day 17. The enantiomeric differences should be taken into consideration for fipronil risk assessment.
机译：Fipronil是一种有效的杀虫剂，但对非目标水生生物具有高毒性作用。本研究检查了淡水藻斜角藻悬浮液中氟虫腈对映体的对映选择性毒性和降解。对映异构体对斜纹夜蛾的急性毒性有显着差异，R-氟吡尼的72小时平均有效浓度（EC50s）为0.29 mg L〜（-1）和1.50 mg L〜（-1）。和S-fipronil。确定了对叶绿素a，叶绿素b和类胡萝卜素浓度的影响，并且氟虫腈对叶绿素a和叶绿素b浓度的影响也是对映选择性的。藻类悬浮液中氟虫腈的降解具有对映体选择性，R-氟吡尼和S-氟吡尼的半衰期分别为2.9 d和3.2 d，对映体分数在第17天达到0.65。应考虑对映体差异用于氟虫腈风险评估。

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  • 来源
    《Environmental toxicology and chemistry》 |2014年第11期|2516-2521|共6页
  • 作者

    Han Qu; Rui-xue Ma; Dong-hui Liu; Peng Wang; Le-dan Huang; Xing-xu Qiu; Zhi-qiang Zhou;

  • 作者单位

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of China;

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of China;

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of China;

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of China;

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of China;

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of China;

    Department of Applied Chemistry, China Agricultural University, Beijing, People's Republic of 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

    Fipronil; Scenedesmus obliguus; Enantioselectivity; Toxicity; Degradation;

    机译：氟苯尼;斜生的场景;对映选择性;毒性;降解;

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