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Évaluation des risques écotoxicologiques liés aux rejets d'effluents hospitaliers dans les milieux aquatiques. Contribution à l'amélioration de la phase « caractérisation des effets ».

Abstract : This study deals with the ecotoxicological risk assessment (EDREcotox) related to hospital wastewater discharging into aquatic environments. The first objective was to improve the knowledge of the ecotoxicological effects of hospital wastewater. Firstly, the combined effects of the main pollutants contained in these effluents were characterized on Daphnia magna. Then, the effluents of a hospital coming from a French large city were studied by integrating their in-depth physicochemical and ecotoxicological characterizations. EDREcotox based on various approaches, substances, substances with combined effects, mono-specific and pluri-specific bioassays, was then carried out. The second objective of this work was to contribute to the improvement of “characterization of ecotoxicological effects” methodologies from a general point of view and for a specific scenario studied: “discharging of hospital effluents from a large city of the South-east of France in the urban sewer network towards the wastewater treatment plant and then towards the river”. Results lead to the conclusion that the combined effects of the studied disinfectants/surfactants mixtures on the mobility of D. magna are additive. Whatever the approach used, our findings reveal the toxicity of the studied effluents. However EDREcotox show that in the case of our scenario, the ecotoxicological risk is weak for the river aquatic organisms. Our results also lead to propose a methodology of characterization of ecotoxicological effects starting with an integrated approach. Finally, this work contributes to establish recommendations for an improved management of hospital effluents.
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https://tel.archives-ouvertes.fr/tel-00289514
Contributor : Clotilde Boillot <>
Submitted on : Friday, June 20, 2008 - 5:22:29 PM
Last modification on : Monday, October 19, 2020 - 11:05:54 AM
Long-term archiving on: : Friday, May 28, 2010 - 7:07:14 PM

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Clotilde Boillot. Évaluation des risques écotoxicologiques liés aux rejets d'effluents hospitaliers dans les milieux aquatiques. Contribution à l'amélioration de la phase « caractérisation des effets ».. domain_other. INSA de Lyon, 2008. Français. ⟨tel-00289514⟩

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