کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4416281 1307775 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The fate of isoproturon in a freshwater microcosm with Lemna minor as a model organism
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
The fate of isoproturon in a freshwater microcosm with Lemna minor as a model organism
چکیده انگلیسی

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%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 66, Issue 4, January 2007, Pages 684–689
نویسندگان
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