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The fate of isoproturon in a freshwater microcosm with Lemna minor as a model organism

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2007

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Schroll, Reiner

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http://nbn-resolving.de/urn:nbn:de:bsz:352-284508
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https://doi.org/10.1016/j.chemosphere.2006.07.087
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Chemosphere. 2007, 66(4), pp. 684-689. ISSN 0045-6535. eISSN 1879-1298. Available under: doi: 10.1016/j.chemosphere.2006.07.087

Zusammenfassung

Degradation, bioaccumulation and volatile loss of the 14C-labeled phenylurea herbicide isoproturon (IPU) was examined in a freshwater microcosm with the free floating macrophyte species Lemna minor during a 21-day exposure time. Isoproturon volatilisation was very low with 0.13 ± 0.01% of the initially applied herbicide. Only a minor amount of the herbicide was completely metabolised, presumably by rhizosphere microorganisms and released as 14CO2. In total, about 9% isoproturon was removed from the aquatic medium during 21 days. The major portion of the pesticide was removed by bioaccumulation of Lemna minor (5.0 ± 0.8%) and the bioconcentration factor (BCF) based on freshweight was 15.8 ± 0.2. However, this study indicated a high persistence of IPU in freshwater ecosystems and a potential hazard due to bioaccumulation in non-target species. The novel experimental system of this study, developed for easy use and multiple sampling abilities, enabled quantitatively studying the fate of isoproturon and showed high reproducibility with a mean average 14C-recovery rate of 97.1 ± 0.7%.

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ISO 690BÖTTCHER, Thomas, Reiner SCHROLL, 2007. The fate of isoproturon in a freshwater microcosm with Lemna minor as a model organism. In: Chemosphere. 2007, 66(4), pp. 684-689. ISSN 0045-6535. eISSN 1879-1298. Available under: doi: 10.1016/j.chemosphere.2006.07.087
BibTex
@article{Bottcher2007-01isopr-28450,
  year={2007},
  doi={10.1016/j.chemosphere.2006.07.087},
  title={The fate of isoproturon in a freshwater microcosm with Lemna minor as a model organism},
  number={4},
  volume={66},
  issn={0045-6535},
  journal={Chemosphere},
  pages={684--689},
  author={Böttcher, Thomas and Schroll, Reiner}
}
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    <dcterms:abstract xml:lang="eng">Degradation, bioaccumulation and volatile loss of the &lt;sup&gt;14&lt;/sup&gt;C-labeled phenylurea herbicide isoproturon (IPU) was examined in a freshwater microcosm with the free floating macrophyte species Lemna minor during a 21-day exposure time. Isoproturon volatilisation was very low with 0.13 ± 0.01% of the initially applied herbicide. Only a minor amount of the herbicide was completely metabolised, presumably by rhizosphere microorganisms and released as &lt;sup&gt;14&lt;/sup&gt;CO&lt;sub&gt;2&lt;/sub&gt;. In total, about 9% isoproturon was removed from the aquatic medium during 21 days. The major portion of the pesticide was removed by bioaccumulation of Lemna minor (5.0 ± 0.8%) and the bioconcentration factor (BCF) based on freshweight was 15.8 ± 0.2. However, this study indicated a high persistence of IPU in freshwater ecosystems and a potential hazard due to bioaccumulation in non-target species. The novel experimental system of this study, developed for easy use and multiple sampling abilities, enabled quantitatively studying the fate of isoproturon and showed high reproducibility with a mean average &lt;sup&gt;14&lt;/sup&gt;C-recovery rate of 97.1 ± 0.7%.</dcterms:abstract>
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