title: Herbicide mitigation in microcosms simulating stormwater basins subject to polluted water inputs.
abstract: Non-point source pollution as a result of wine-growing activity is of high concern. Stormwater basins (SWB) found downstream of vineyard watersheds could show a potential for the mitigation of runoff water containing herbicides. In this study, mitigation of vinery-used herbicides was studied in microcosms with a very similar functioning to that recorded in SWB. Mitigation efficiency of glyphosate, diuron and 3,4-dichloroaniline (3,4-DCA) was investigated by taking into account hydraulic flow rate, mitigation duration, bioaugmentation and plant addition. Mitigation efficiency measured in water ranged from 63.0% for diuron to 84.2% for 3,4-DCA and to 99.8% for glyphosate. Water-storage duration in the SWB and time between water supplies were shown to be the most influential factors on the mitigation efficiency. Six hours water-storage duration allowed an efficient sorption of herbicides and their degradation by indigenous microorganisms in 5 weeks. Neither bioaugmentation nor plant addition had a significant effect on herbicide mitigation. Our results show that this type of SWB are potentially relevant for the mitigation of these herbicides stemming from wine-growing activity, providing a long enough hydraulic retention time.
authors.affiliation: Université de Haute Alsace, EA 3991, LVBE (Laboratoire Vigne Biotechnologies et Environnement), Equipe Dépollution Biologique des Sols, 33 rue de Herrlisheim, BP 50568, 68008 Colmar Cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Bois
authors.forename: D
authors.initials: D
authors.lastname: Huguenot
authors.forename: K
authors.initials: K
authors.lastname: Jézéquel
authors.forename: M
authors.initials: M
authors.lastname: Lollier
authors.forename: J Y
authors.initials: JY
authors.lastname: Cornu
authors.forename: T
authors.initials: T
authors.lastname: Lebeau
mesh_terms: D001673:Biodegradation, Environmental; D005998:Glycine / Q000031:analogs & derivatives / Q000737:chemistry; D014874:Water Pollutants, Chemical; D000097797:Glyphosate
chemical_list: D005998:Glycine; D014874:Water Pollutants, Chemical; D000097797:Glyphosate