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

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• 作者：Nicolai D. Jablonowski^b ; ^{n.d.jablonowski@fz-juelich.de} ; ^{n.d.jablonowski@daad-alumni.de} ; Andreas Linden^a ; Stephan Kö ; ppchen^a ; Bjö ; rn Thiele^b ; ^c ; Diana Hofmann^a ; Werner Mittelstaedt^a ; Thomas Pü ; tz^a ; Peter Burauel^a ; ^{p.burauel@fz-juelich.de}
• 关键词：Ethidimuron ; Methabenzthiazuron ; Anilazine ; Persistence ; Bound residues
• 刊名：Environmental Pollution
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：168
• 期：Complete
• 页码：29-36
• 全文大小：341 K

文摘

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.