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Caractérisation moléculaire de la matière organique dans des milieux anthropisés

Abstract : Organic matter is a complex mixture of molecules of various sizes and origins bearing information related to the environmental conditions and the different contributions identified the studied environment. Its molecular characterization makes it possible to highlight source markers, to define its degradation state and its degree of anthropization. Replaced in a broader context, the study of the organic fraction of any matrix allows a better understanding of the solid and dissolved transfer of matter in a given environment, its chronology and its reactivity. My research focused on describing the molecular composition of organic materials, mostly of anthropic origin, such as crude oil or highly contaminated such as sewage sludge or aquatic sediments in urban and industrial environments. Their exhaustive characterization allowed me to identify molecular markers relevant to the tracing of contaminant transfers in aquatic environments. Focusing more specifically on polycyclic aromatic compounds, the study of the remobilization of contaminated sediments in an industrial river in northern Lorraine has highlighted the impact of a century of steelmaking activities in this valley. We showed that the river still bears the signature of this pressure thirty years after the cessation of activities and that it is possible to identify the different ways of transfer of contaminants according to the hydrological conditions.
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Submitted on : Wednesday, May 5, 2021 - 9:13:08 AM
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HDR 2018 LMH 12 nov 2018.pdf
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  • HAL Id : tel-03217705, version 1



Laurence Mansuy-Huault. Caractérisation moléculaire de la matière organique dans des milieux anthropisés. Interfaces continentales, environnement. Université de Lorraine, 2019. ⟨tel-03217705⟩



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