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Long-term persistence of various 14C-labeled pesticides in soils.
- Source :
- Environmental Pollution; Sep2012, Vol. 168, p29-36, 8p
- Publication Year :
- 2012
-
Abstract
- The fate of the <superscript>14</superscript>C-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 <superscript>14</superscript>C 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 <superscript>14</superscript>C 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 &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02697491
- Volume :
- 168
- Database :
- Supplemental Index
- Journal :
- Environmental Pollution
- Publication Type :
- Academic Journal
- Accession number :
- 76495750
- Full Text :
- https://doi.org/10.1016/j.envpol.2012.04.022