Experiments in water-macrophyte systems to uncover the dynamics of pesticide mitigation processes in vegetated surface waters/streams

Environmental Science and Pollution Research International
Christoph StangRalf Schulz

Abstract

Knowledge on the dynamics and the durability of the processes governing the mitigation of pesticide loads by aquatic vegetation in vegetated streams, which are characterized by dynamic discharge regimes and short chemical residence times, is scarce. In a static long-term experiment (48 h), the dissipation of five pesticides from the aqueous phase followed a biphasic pattern in the presence of aquatic macrophytes. A dynamic concentration decrease driven by sorption to the macrophytes ranged from 8.3 to 60.4% for isoproturon and bifenox, respectively, within the first 2 h of exposure. While the aqueous concentrations of imidacloprid, isoproturon, and tebufenozide remained constant thereafter, the continuous but decelerated concentration decrease of difenoconazole and bifenox in the water-macrophyte systems used here was assumed to be attributed to macrophyte-induced degradation processes. In addition, a semi-static short-term experiment was conducted, where macrophytes were transferred to uncontaminated medium after 2 h of exposure to simulate a transient pesticide peak. In the first part of the experiment, adsorption to macrophytes resulted in partitioning coefficients (logK D_Adsorp) ranging from 0.2 for imidacloprid to 2.2 for...Continue Reading

References

Sep 4, 1999·Archives of Environmental Contamination and Toxicology·S J CrumM Leistra
Jun 6, 2003·Environmental Science & Technology·Ralf SchulzSue K C Peall
Oct 6, 2005·Environmental Science & Technology·Martin ElsnerRene P Schwarzenbach
Jul 6, 2006·Journal of Agricultural and Food Chemistry·R M GarcinuñoC Camara
Jun 26, 2007·The Science of the Total Environment·Stefan ReichenbergerHans-Georg Frede
Nov 6, 2007·Chemosphere·Rachel OlettePhilippe Eullaffroy
May 22, 2009·Archives of Environmental Contamination and Toxicology·M T MooreS Smith
Feb 9, 2011·Environmental Science and Pollution Research International·Rachel Dosnon-OlettePhilippe Eullaffroy
Apr 22, 2011·Environmental Toxicology and Chemistry·Elodie PasseportJulien Tournebize
Jun 30, 2011·Journal of Environmental Quality·Sebastian StehleRalf Schulz
Dec 3, 2014·Environment International·Jan Vymazal, Tereza Březinová
Nov 1, 2013·Journal of Environmental Quality·Christoph StangRalf Schulz

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Citations

Feb 27, 2020·Environmental Toxicology and Chemistry·Kelly MoranDawit Tadesse
Apr 2, 2017·Bulletin of Environmental Contamination and Toxicology·Jennifer P VoorheesRon S Tjeerdema

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