• [hal-03167988] Ecotoxicological risk assessment of contaminants of emerging concern identified by “suspect screening” from urban wastewater treatment plant effluents at a territorial scale

    Urban wastewater treatment plants (WWTP) are a major vector of highly ecotoxic contaminants of emerging concern (CECs) for urban and sub-urban streams. Ecotoxicological risk assessments (ERAs) provide essential in- formation to public environmental authorities. Nevertheless, ERAs are mainly performed at very local scale (one or few WWTPs) and on pre-selected list of CECs. To cope with these limits, the present study aims to develop a territorial-scale ERA on CECs previously identified by a “suspect screening” analytical approach (LC-QToF-MS) and quantified in the effluents of 10 WWTPs of a highly urbanized territory during three periods of the year. Among CECs, this work focused on pharmaceutical residue and pesticides. ERA was conducted following two complementary methods : (1) a single substance approach, based on the calculation for each CEC of risk quotients (RQs) by the ratio of Predicted Environmental Concentration (PEC) and Predicted No Effect Concentration (PNEC), and (2) mixture risk assessment (“cocktail effect”) based on a concentration addition model (CA), sum- ming individual RQs. Chemical results led to an ERA for 41 CEC (37 pharmaceuticals and 4 pesticides) detected in treated effluents. Single substance ERA identified 19 CECs implicated in at least one significant risk for streams, with significant risks for DEET, diclofenac, lidocaine, atenolol, terbutryn, atorvastatin, methocarbamol, and venlafaxine (RQs reaching 39.84, 62.10, 125.58, 179.11, 348.24, 509.27, 1509.71 and 3097.37, respectively).

    Voir en ligne : https://hal-univ-lyon1.archives-ouv...

  • [hal-03162034] Occurrence and removal of emerging pollutants in urban sewage treatment plants using LC-QToF-MS suspect screening and quantification

    Urban wastewaters (WW) are a major vector of many emerging pollutants (EPs) to aquatic ecosystems, as urban wastewater treatment plants (WWTPs) are not designed to abate them. New methods are now critically necessary for a more comprehensive analysis of WW samples and for the assessment of the WWTP efficiency in EP removal. To this end, the present study aims to develop a methodology to identify and quantify EPs, especially pharmaceutical residues and pesticides, in the raw and treated wastewater of 10 heterogeneous WWTPs in a highly urbanized ter- ritory in France over three sampling campaigns, through the following steps : (1) development and implementation of a suspect screening of EPs in WW samples, based on a solid phase extraction followed by an LC-QToF-MS analysis ; (2) confirmation of their identification by reinjection of WW samples spiked with authentic analytical standards ; (3) quantification of previously identified compounds by targeted LC-QToF-MS analysis in raw and treated effluents and assessment of their removal efficiency by WWTPs. Forty-one EPs, including 37 pharmaceutical residues (such as anti-depressive, anti-hypertensive, or antipsychotic drugs) and 4 pesticides, were identified by suspect screening. Some of them (e.g. milnacipran) are reported for the first time in urban WWTPs in this study. High variability in de- tection frequency and concentrations were observed in function of the EP and WWTP. Nevertheless, median re- moval rates were considered negative or low for more than 50% of the EPs (respectively 4 and 17), leading to a quantification of significant concentrations in treated WW. Their release into receiving streams may thus lead to ecotoxicological risks that should be evaluated in order to prevent any degradation of the exposed ecosystems.

    Voir en ligne : https://hal-univ-lyon1.archives-ouv...

  • [halshs-01323475] Forest Owners Motivations for Adopting Programs of Biodiversity Protection

    The results of a survey of private forest owners on adoption of a number of current programs, that include biodiversity protection to some degree, are presented. Adoption amounts to 22% for all the programs jointly, and is shown to depend on economic, social and ethical motives, with significant crowding-out between the economic and ethical motives, but not with social motives. Adoption of each program is strongly negatively correlated to each other. Nearly no respondent adopted the Natura 2000 program. The results constitute a test of the " reputational crowding-out " theory of Bénabou and Tirole (2006)

    Voir en ligne : https://halshs.archives-ouvertes.fr...

Demande d'accès

Parcours RISE

Profil ingénieur (ECL, ENTPE, ...)
Dossier de candidature à l’ECL
Info : R. Perkins
Profil juriste
Dossier de candidature à Lyon 3
Info : I. Michallet
Profil économiste ou politiste
Dossier de candidature à Lyon 2
Info : P.Polomé

Parcours SEIU

Le dossier de candidature à l’ENTPE est disponible en ligne ici.
Le dossier de candidature à l’ENMSE est disponible en ligne ici.
Le contenu des deux dossiers est similaire.
La date limite pour le retour des dossiers est fixée au 31 mai 2021.

Pour toute information complémentaire sur les modalités de candidature au parcours SEIU, contacter :
Yves Perrodin à l’ENTPE ou Natacha Gondran à l’ENMSE

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