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000057152 0247_ $$2pmid$$apmid:17166548
000057152 0247_ $$2DOI$$a10.1016/j.chemosphere.2006.10.067
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000057152 084__ $$2WoS$$aEnvironmental Sciences
000057152 1001_ $$0P:(DE-HGF)0$$aLaabs, V.$$b0
000057152 245__ $$aPesticide fate in tropical wetlands of Brazil: An aquatic microcosm study under semi-field conditions
000057152 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2007
000057152 300__ $$a975 - 989
000057152 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000057152 440_0 $$01228$$aChemosphere$$v67$$x0045-6535
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000057152 520__ $$aA contamination of off-site aquatic environments with pesticides has been observed in the tropics, yet only sparse information exists about pesticide fate in such ecosystems. The objective of our semi-field study was to elucidate the fate of alachlor, atrazine, chlorpyrifos, endosulfan, metolachlor, profenofos, simazine, and trifluralin in the aqueous environment of the Pantanal wetland (MT, Brazil). To this aim, water and water/sediment microcosms of two sizes (0.78 and 202 l) were installed in the outskirts of this freshwater lagoon environment and pesticide dissipation was monitored for up to 50 d after application. The physical-chemical water conditions that developed in the microcosms were reproducible among field replicates for both system sizes. Pesticide dissipation was substantially enhanced for most pesticides in small microcosms relative to the large ones (reduced DT(50) by a factor of up to 5.3). The presence of sediment in microcosms led to increased persistence of chlorpyrifos, endosulfan, and trifluralin in the test systems, while for polar pesticides (alachlor, atrazine, metolachlor, profenofos, and simazine) a lesser persistence was observed. Atrazine, simazine, metolachlor, and alachlor were identified as the most persistent pesticides in large water microcosms (DT(50) > or = 47 d); in large water/sediment systems endosulfan beta, atrazine, metolachlor, and simazine showed the slowest dissipation (DT(50) > or = 44 d). A medium-term accumulation in the sediment of tropical ecosystems can be expected for chlorpyrifos and endosulfan isomers (11-35% of applied amount still extractable at 50 d after application). We conclude that the persistence of the studied pesticides in aquatic ecosystems of the tropics is not substantially lower than during summer in temperate regions.
000057152 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000057152 588__ $$aDataset connected to Web of Science, Pubmed
000057152 650_2 $$2MeSH$$aBrazil
000057152 650_2 $$2MeSH$$aGeologic Sediments: analysis
000057152 650_2 $$2MeSH$$aPesticides: analysis
000057152 650_2 $$2MeSH$$aPesticides: metabolism
000057152 650_2 $$2MeSH$$aTropical Climate
000057152 650_2 $$2MeSH$$aWater Microbiology
000057152 650_2 $$2MeSH$$aWater Pollutants, Chemical: analysis
000057152 650_2 $$2MeSH$$aWater Pollutants, Chemical: metabolism
000057152 650_2 $$2MeSH$$aWetlands
000057152 650_7 $$00$$2NLM Chemicals$$aPesticides
000057152 650_7 $$00$$2NLM Chemicals$$aWater Pollutants, Chemical
000057152 650_7 $$2WoSType$$aJ
000057152 65320 $$2Author$$aalachlor
000057152 65320 $$2Author$$aatrazine
000057152 65320 $$2Author$$achlorpyrifos
000057152 65320 $$2Author$$adeethyl atrazine
000057152 65320 $$2Author$$adissipation
000057152 65320 $$2Author$$aendosulfan
000057152 65320 $$2Author$$aendosulfan sulfate
000057152 65320 $$2Author$$ametolachlor
000057152 65320 $$2Author$$aprofenofos
000057152 65320 $$2Author$$asediment
000057152 65320 $$2Author$$asimazine
000057152 65320 $$2Author$$atrifluralin
000057152 65320 $$2Author$$awater
000057152 7001_ $$0P:(DE-Juel1)VDB36636$$aWehrhan, A.$$b1$$uFZJ
000057152 7001_ $$0P:(DE-HGF)0$$aPinto, A.$$b2
000057152 7001_ $$0P:(DE-HGF)0$$aDores, E.$$b3
000057152 7001_ $$0P:(DE-HGF)0$$aAmelung, W.$$b4
000057152 773__ $$0PERI:(DE-600)1496851-4$$a10.1016/j.chemosphere.2006.10.067$$gVol. 67, p. 975 - 989$$p975 - 989$$q67<975 - 989$$tChemosphere$$v67$$x0045-6535$$y2007
000057152 8567_ $$uhttp://dx.doi.org/10.1016/j.chemosphere.2006.10.067
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