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| HAL : hal-00477011, version 1 |
| DOI : 10.1080/03067310903195045 |
| Fiche détaillée |  Récupérer au format |
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| International Journal of Environ Analytic Chemistry vol. 90 (2010) Available on : http://oatao.univ-toulouse.fr/3380/1/Taghavi_3380.pdf , |
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| Flood event impact on pesticide transfer in a small agricultural catchment (Moutousse at Aurade, south west France) |
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| Lobat Taghavi 1Jean-Luc Probst 1 |
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| (06/01/2010) |
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| In this paper, pesticide transfer dynamic is studied during two flood events in a small experimental catchment close to Toulouse (south west France). Thirteen pesticide molecules (herbicides, fungicides) have been analysed by multi-residue technique on filtered and unfiltered waters. The results show very high pesticide concentrations in the different fractions compared to low flow periods and to the data collected by the French institutional networks in charge of the pesticide river water pollution survey. Several molecules present concentration higher than 0.1 mgL-1 and even higher than 1 mgL-1 in the unfiltered waters. In the suspended matters the concentrations vary respectively between 0.1 and 30 mg g-1 according to the molecules and can represent 40 to 90% of the total concentration for low soluble molecules. All the molecule concentrations and fluxes increase during the flood flows and have positive relationships with the stream discharge, but hysteresis between rising and falling periods can be observed for some molecules. Pesticide concentrations in unfiltered waters and partitioning between dissolved and particulate fractions (Kd¼[diss]/[part]) are controlled by dissolved organic carbon and total suspended matter. A good negative relationship can be established between logKd and logKow for 6 molecules. |
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| 1 : | Laboratoire Ecologie Fonctionnelle et Environnement (EcoLab) |
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PRES Université de Toulouse – Institut National Polytechnique de Toulouse - INPT – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées – CNRS : UMR5245 |
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| Domaine | : | Sciences du Vivant/Sciences agricoles/Agronomie Sciences du Vivant/Sciences agricoles/Sciences et techniques de l'agriculture Sciences de l'environnement/Biodiversité et Ecologie |
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| Fungicide – Herbicide – Stream waters – filtred waters – unfiltered waters – Suspended matters – Dissolved organic carbon – Hysteresis – Partition coefficient |
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| hal-00477011, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00477011 | |
| oai:hal.archives-ouvertes.fr:hal-00477011 | |
| Contributeur : Open Archive Toulouse Archive Ouverte (oatao) | |
| Déposé pour le compte de : | |
| Soumis le : Mardi 27 Avril 2010, 17:48:44 | |
| Dernière modification le : Mardi 27 Avril 2010, 17:48:44 | |
