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茚虫威对映体在土壤中的选择性降解

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李晓刚, 刘一平, 刘双清, 胡昌弟, 柏连阳, 高必达, 姜辉. 茚虫威对映体在土壤中的选择性降解[J]. 环境化学, 2012, 31(8): 1262-1267.
引用本文: 李晓刚, 刘一平, 刘双清, 胡昌弟, 柏连阳, 高必达, 姜辉. 茚虫威对映体在土壤中的选择性降解[J]. 环境化学, 2012, 31(8): 1262-1267.
shu
LI Xiaogang, LIU Yiping, LIU Shuangqing, HU Changdi, BAI Lianyang, GAO Bida, JIANG Hui. Enantioselective degradation of indoxacarb enantiomers in soils[J]. Environmental Chemistry, 2012, 31(8): 1262-1267.
Citation: LI Xiaogang, LIU Yiping, LIU Shuangqing, HU Changdi, BAI Lianyang, GAO Bida, JIANG Hui. Enantioselective degradation of indoxacarb enantiomers in soils[J]. Environmental Chemistry, 2012, 31(8): 1262-1267.
shu

茚虫威对映体在土壤中的选择性降解

  • 1.

    湖南农业大学生物安全科学技术学院, 长沙, 410128;

  • 2.

    湖南省农药检定所, 长沙, 410005;

  • 3.

    湖南人文科技学院, 娄底, 417000;

  • 4.

    农业部农药检定所, 北京, 100125

  • 基金项目:

    中国博士后科学基金(20090461007)

    湖南省高等学校科学研究重点项目(11A053)

    湖南省研究生科研创新项目(CX2010B295)资助.

Enantioselective degradation of indoxacarb enantiomers in soils

  • 1.

    College of Bio-safety Science & Technology, Hunan Agricultural University, Changsha, 410128, China;

  • 2.

    Hunan Institute for the Control of Agrochemicals, Changsha, 410005, China;

  • 3.

    Hunan University of Humanities, Science and Technology, Loudi, 417000, China;

  • 4.

    Institute for the Control of Agrochemicals, Ministry of Agriculture, Beijing, 100125, China

  • Fund Project:

  • 摘要: 研究了茚虫威在4种不同类型的农田土壤中的降解动态和选择性降解行为.结果表明,添加水平在0.1-5.0 mg·kg-1的条件下,茚虫威对映体在土壤中添加回收率在(78.56±3.16)%-(108.16±5.32)%之间,最低检测限为0.01 mg·kg-1,定量限为0.05 mg·kg-1.茚虫威在土壤中的消解符合一级动力学规律,消解过程受土壤pH值、有机质含量等因素的影响.茚虫威对映体在1#-4#土壤中的降解速率存在明显的差异性,E1的半衰期分别为15.33 d、19.09 d、10.61 d、11.40 d,E2的半衰期分别为15.44 d、15.61 d、8.58 d、11.13 d,降解快慢顺序为:3# > 4# > 1# > 2#,表明茚虫威在偏碱性的土壤中的降解速率要快于在酸性土壤中,且对映体的半衰期差异在有机质含量较高的土壤中表现得更加明显;对映体分数EF值(enantiomer fraction)表明茚虫威对映体在4种供试土壤中除了1#土壤外均存在明显的立体选择性降解.
    Abstract: The dissipation dynamic and enantioselective degradation of indoxacarb in soils were studied by incubation with racemic indoxacarb in four agricultural soils. When the concentration of indoxacarb was fortified from 0.1 to 5.0 mg穔g-1, the average recoveries varied from (78.56±3.16)% to (108.16±5.32)%, respectively. The limit of detection of indoxacarb in the test soils was 0.01 mg穔g-1, and the limit of quantitation was 0.05 mg穔g-1. The dissipation of indoxacarb enantiomers in the soils followed pseudo-first-order kinetic. The dissipation rate was greatly influenced by pH and organic matter content of each soil. The results showed that the degradation rate of indoxacarb was different in soils 1#-4#. The half-time of the first enantiomer was 15.33 d, 19.09 d, 10.61 d, 11.40 d, and the half-time of the second enantiomer was 15.44 d, 15.61 d, 8.58 d, 11.13 d. The dissipation rate in the descending order was 3# > 4# > 1# > 2#. The results indicated a faster dissipation rate for indoxacarb in alkaline soil than in acidic soil, and there was a bigger difference on half-time period of indoxacarb enantiomers in soil of high organic matter. The EF value indicated that the stereoselective degradation led to significant difference between two enantiomers in the test soils except 1#.
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  • 收稿日期:  2011-11-21
李晓刚, 刘一平, 刘双清, 胡昌弟, 柏连阳, 高必达, 姜辉. 茚虫威对映体在土壤中的选择性降解[J]. 环境化学, 2012, 31(8): 1262-1267.
引用本文: 李晓刚, 刘一平, 刘双清, 胡昌弟, 柏连阳, 高必达, 姜辉. 茚虫威对映体在土壤中的选择性降解[J]. 环境化学, 2012, 31(8): 1262-1267.
shu
LI Xiaogang, LIU Yiping, LIU Shuangqing, HU Changdi, BAI Lianyang, GAO Bida, JIANG Hui. Enantioselective degradation of indoxacarb enantiomers in soils[J]. Environmental Chemistry, 2012, 31(8): 1262-1267.
Citation: LI Xiaogang, LIU Yiping, LIU Shuangqing, HU Changdi, BAI Lianyang, GAO Bida, JIANG Hui. Enantioselective degradation of indoxacarb enantiomers in soils[J]. Environmental Chemistry, 2012, 31(8): 1262-1267.
shu

茚虫威对映体在土壤中的选择性降解

  • 1.  湖南农业大学生物安全科学技术学院, 长沙, 410128;
  • 2.  湖南省农药检定所, 长沙, 410005;
  • 3.  湖南人文科技学院, 娄底, 417000;
  • 4.  农业部农药检定所, 北京, 100125
  • 收稿日期:  2011-11-21
基金项目:

中国博士后科学基金(20090461007)

湖南省高等学校科学研究重点项目(11A053)

湖南省研究生科研创新项目(CX2010B295)资助.

摘要: 研究了茚虫威在4种不同类型的农田土壤中的降解动态和选择性降解行为.结果表明,添加水平在0.1-5.0 mg·kg-1的条件下,茚虫威对映体在土壤中添加回收率在(78.56±3.16)%-(108.16±5.32)%之间,最低检测限为0.01 mg·kg-1,定量限为0.05 mg·kg-1.茚虫威在土壤中的消解符合一级动力学规律,消解过程受土壤pH值、有机质含量等因素的影响.茚虫威对映体在1#-4#土壤中的降解速率存在明显的差异性,E1的半衰期分别为15.33 d、19.09 d、10.61 d、11.40 d,E2的半衰期分别为15.44 d、15.61 d、8.58 d、11.13 d,降解快慢顺序为:3# > 4# > 1# > 2#,表明茚虫威在偏碱性的土壤中的降解速率要快于在酸性土壤中,且对映体的半衰期差异在有机质含量较高的土壤中表现得更加明显;对映体分数EF值(enantiomer fraction)表明茚虫威对映体在4种供试土壤中除了1#土壤外均存在明显的立体选择性降解.

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