Environmental Pollution 2012-09-01

Long-term persistence of various 14C-labeled pesticides in soils.

Nicolai D Jablonowski, Andreas Linden, Stephan Köppchen, Björn Thiele, Diana Hofmann, Werner Mittelstaedt, Thomas Pütz, Peter Burauel

文献索引：Environ. Pollut. 168 , 29-36, (2012)

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摘要

The fate of the 14C-labeled herbicides ethidimuron (ETD), methabenzthiazuron (MBT), and the fungicide anilazine (ANI) in soils was evaluated after long-term aging (9-17 years) in field based lysimeters subject to crop rotation. Analysis of residual 14C activity in the soils revealed 19% (ETD soil; 0-10 cm depth), 35% (MBT soil; 0-30), and 43% (ANI soil; 0-30) of the total initially applied. Accelerated solvent extraction yielded 90% (ETD soil), 26% (MBT soil), and 41% (ANI soil) of residual pesticide 14C activity in the samples. LC-MS/MS analysis revealed the parent compounds ETD and MBT, accounting for 3% and 2% of applied active ingredient in the soil layer, as well as dihydroxy-anilazine as the primary ANI metabolite. The results for ETD and MBT were matching with values obtained from samples of a 12 year old field plot experiment. The data demonstrate the long-term persistence of these pesticides in soils based on outdoor trials.Copyright © 2012. Published by Elsevier Ltd.

相关化合物

  • 甲基苯噻隆
  • 敌菌灵标准溶液

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