Transformation and transport of inorganic and synthetic pesticides in soils of agricultural catchments

Abstract : Despite homologation tests of pesticides and metals, alarming concentrations are measured in the environment. A better knowledge of the transformation processes undergone by these products in agrosystems is needed to predict and limit the pollution. This PhD. thesis allowed to understand the transformation and transport of pesticides and metals in agricultural soils during 200 days and with respect to different hydro-climatic conditions using sequential extraction and isotopic fractionation of pesticides (compound specific isotopic analyses, CSIA) and metals. This work revealed the relevant of soil organic matter on the speciation of pollutants, the relationship between hydro-climatic conditions, the dissipation and the transformation mechanisms of peticides, and how pollutant infiltration is controlled both by rainfall length and frequency. These resuls will improve the transport models of pesticides in agrosystems.
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Fatima Meite. Transformation and transport of inorganic and synthetic pesticides in soils of agricultural catchments. Geochemistry. Université de Strasbourg, 2018. English. ⟨NNT : 2018STRAH003⟩. ⟨tel-02163200⟩

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