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Relationship Between Atmospheric Dissolved Deposition and Mineral Dust Deposition in French Forests Texte intégral
2013
Lequy, Emeline | Nicolas, Manuel | Conil, Sébastien | Turpault, Marie-Pierre, M.-P. | Unité de recherche Biogéochimie des Ecosystèmes Forestiers (BEF) ; Institut National de la Recherche Agronomique (INRA) | Observ Perenne Environm, DRD Observat Surveillance ; Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA) | Direct Tech & Commerciale Boi ; Partenaires INRAE | Andra; GIP ECOFOR
International audience | Calcium dissolved deposition shows an unusual spatial structure in France, probably due to the contribution of southern air masses from Mediterranean Sea and Saharan desert. These masses are often loaded with terrigenous particles that contain carbonates. However, no precise relationship has been quantified between dissolved Ca and mineral dust deposition (MDD). The database of the French network RENECOFOR, gathering atmospheric deposition <0.45 mu m in 27 sites near forests during 18 years, was used to determine the non-sea-salt atmospheric deposition over France. This study (1) explores the relationship between dissolved components to decipher their origin in atmospheric deposition nearby forests and (2) tests the use of dissolved Ca and Mg as proxies for MDD. In the RENECOFOR database, non-sea-salt Ca (nssCa) preferentially deposited between May and August. MDD observed in RENECOFOR was synchronic with high nssCa deposition, particularly in June 2008, when air mass highly loaded with Saharan dust covered France. The dissolution of this mineral dust likely contributed to the nssCa deposition of this period and suggested a relationship between the depositions of nssCa and MDD. Then, MDD was specifically sampled with dissolved deposition in four sampling sites. Encouraging relationships were found between MDD and the depositions of nssMg and nssCa, suggesting that the latter could be used as a proxy for MDD in regions where it is not monitored, and in a retrospective approach in order to calculate nutrient fluxes.
Afficher plus [+] Moins [-]Coral recruitment and potential recovery of eutrophied and blast fishing impacted reefs in Spermonde Archipelago, Indonesia Texte intégral
2013
Sawall, Yvonne | Jompa, Jamaluddin | Litaay, Magdalena | Maddusila, Andi | Richter, Claudio
Coral recruitment was assessed in highly diverse and economically important Spermonde Archipelago, a reef system subjected to land-based sources of siltation/pollution and destructive fishing, over a period of 2 years. Recruitment on settlement tiles reached up to 705 spat m�2 yr�1 and was strongest in the dry season (July–October), except off-shore, where larvae settled earlier. Pocilloporidae dominated nearshore, while a more diverse community of Acroporidae, Poritidae and others settled in the less polluted mid-shelf and off-shore reefs. Non-coral fouling community appeared to hardly influence initial coral settlement on the tiles, although, this does not necessarily infer low coral post-settlement mortality, which may be enhanced at the near- and off-shore reefs as indicated by increased abundances of potential space competitors on natural substrate. Blast fishing showed no local reduction in coral recruitment and live hard coral cover increased in oligotrophic reefs, indicating potential for coral recovery, if managed effectively.
Afficher plus [+] Moins [-]Differential effects of oxidised and reduced nitrogen on vegetation and soil chemistry of species-rich acidic grasslands Texte intégral
2013
Dorland, Edu | Stevens, Carly J. | Gaudnik, Cassandre | Corcket, Emmanuel | Rotthier, Suzanne | Wotherspoon, Katherine | Jokerud, Mari | Vandvik, Vigdis | Soons, Merel B. | Hefting, Mariet M. | Aarrestad, Per Arild | Alard, Didier | Diekmann, Martin | Dupre, Cecilia | Dise, Nancy B. | Gowing, David J. G. | Bobbink, Roland | Research Institute | Lancaster Environment Centre ; Lancaster University | Biodiversité, Gènes & Communautés (BioGeCo) ; Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB) | Nature Conservation and Plant Ecology Group ; Wageningen University and Research [Wageningen] (WUR) | Open University | University of Bergen (UiB) | Universiteit Utrecht / Utrecht University [Utrecht] | Norwegian Institute for Nature Research (NINA) | Universität Bremen [Deutschland] = University of Bremen [Germany] = Université de Brême [Allemagne] | School of Science and the Environment ; Manchester Metropolitan University (MMU) | Radboud University [Nijmegen]
International audience | Emissions and deposition of ammonia and nitrogen oxides have strongly increased since the 1950s. This has led to significant changes in the nitrogen (N) cycle, vegetation composition and plant diversity in many ecosystems of high conservation value in Europe. As a consequence of different regional pollution levels and of the increased importance of reduced N in the near future, determining the effect of different forms of N is an important task for understanding the consequences of atmospheric N inputs. We have initiated three replicated N addition experiments in species-rich, acidic grasslands spanning a climatic gradient in the Atlantic biogeographic region of Europe in Norway, Wales and France at sites with low levels of pollution. N was added in two doses (0 and 70 kg N ha−1 year−1 above background) and in three forms (oxidised N, reduced N and a 50–50 combination). After 2.5 years of N additions, the effects of these treatments on plant biomass, plant nutritional status, soil pH and soil nutrient availability were determined. Impacts of the N additions were observed within the 2.5-year research period. In some cases, the first signs of differential effects of N form could also be demonstrated. In the French site, for example, grass biomass was significantly increased by the oxidised N treatments but decreased by the reduced N treatments. In the Norwegian site, the reduced N treatments significantly reduced soil pH, whereas oxidised N did not. Effects on nutrient availability were also observed. These experiments will be continued to elucidate the longer term impacts of N deposition on these grasslands.
Afficher plus [+] Moins [-]Assessment of the contribution of sewer deposits to suspended solids loads in combined sewer systems during rain events. Texte intégral
2013
Hannouche, A. | Chebbo, G. | Joannis, C. | Laboratoire Eau, Environnement et Systèmes Urbains (LEESU) ; AgroParisTech-Université Paris-Est Marne-la-Vallée (UPEM)-École nationale des ponts et chaussées (ENPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)
International audience | : Within the French observatories network SOERE "URBIS," databases of continuous turbidity measurements accumulating hundreds of events and many dry weather days are available for two sites with different features (Clichy in Paris and Ecully in Lyon). These measurements, converted into total suspended solids (TSS) concentration using TSS-turbidity relationships and combined with a model of runoff event mean concentration, enable the assessment of the contribution of sewer deposits to wet weather TSS loads observed at the outlet of the two watersheds. Results show that the contribution of sewer deposits to wet weather suspended solid's discharges is important but variable (between 20 and 80 % of the mass at the outlet depending on the event), including a site allegedly free of (coarse) sewer deposits. The uncertainties associated to these results are assessed too.
Afficher plus [+] Moins [-]Meta-analysis of environmental contamination by phthalates. Texte intégral
2013
Bergé, Alexandre | Cladière, Mathieu | Gasperi, Johnny | Coursimault, Annie | Tassin, Bruno | Moilleron, Régis | Laboratoire Eau, Environnement et Systèmes Urbains (LEESU) ; AgroParisTech-Université Paris-Est Marne-la-Vallée (UPEM)-École nationale des ponts et chaussées (ENPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) | laboratoire central de la préfecture de police (LCPP) ; Préfecture de police de Paris
International audience | Phthalate acid esters (PAE), commonly named phthalates, are toxics classified as endocrine-disrupting compounds; they are primarily used as additives to improve the flexibility in polyvinyl chloride. Many studies have reported the occurrence of phthalates in different environmental matrices; however, none of these studies has yet established a complete overview for those compounds in the water cycle within an urban environment. This review summarizes PAE concentrations for all environmental media throughout the water cycle, from atmosphere to receiving waters. Once the occurrences of compounds have been evaluated for each environmental compartment (urban wastewater, wastewater treatment plants, atmosphere, and the natural environment), we reviewed data in order to identify the fate of PAE in the environment and establish whether geographical and historical trends exist. Indeed, geographical and historical trends appear between Europe and other countries such as USA/Canada and China, however they remain location dependent. This study aimed at identifying both the correlations existing between environmental compartments and the processes influencing the fate and transport of these contaminants into the environment. In Europe, the concentrations measured in waterways today represent the background level of contamination, which provides evidence of a past diffuse pollution. In contrast, an increasing trend has actually been observed for developing countries, especially for China.
Afficher plus [+] Moins [-]Alkylphenolic compounds and bisphenol A contamination within a heavily urbanized area: case study of Paris. Texte intégral
2013
Cladière, Mathieu | Gasperi, Johnny | Lorgeoux, Catherine | Bonhomme, Céline | Rocher, Vincent | Tassin, Bruno | Laboratoire Eau, Environnement et Systèmes Urbains (LEESU) ; AgroParisTech-Université Paris-Est Marne-la-Vallée (UPEM)-École nationale des ponts et chaussées (ENPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) | SIAAP - Direction du Développement et de la Prospective ; Syndicat interdépartemental pour l'assainissement de l'agglomération parisienne (SIAAP) | Programmes OPUR et PIREN-Seine
International audience | This study evaluates the influence of a heavily urbanized area (Paris Metropolitan area), on receiving water contamination by both bisphenol A (BPA) and alkylphenol ethoxylate (APE) biodegradation product. The study began by investigating concentrations within urban sources. In addition to the more commonly studied wastewater treatment plant effluent, wet weather urban sources (including combined sewer overflows, urban runoff, and total atmospheric fallout) were considered. The initial results highlight a significant contamination of all urban sources (from a few nanograms per liter in atmospheric fallout to several micrograms per liter in the other sources) with clearly distinguishable distribution patterns. Secondly, concentration changes along the Seine River from upstream of the Paris Metropolitan area to downstream were investigated. While the concentrations of BPA and nonylphenoxy acetic acid (NP(1)EC) increase substantially due to urban sources, the 4-nonylphenol concentrations remain homogeneous along the Seine. These results suggest a broad dissemination of 4-nonylphenol at the scale of the Seine River basin. Moreover, the relationship between pollutant concentrations and Seine River flow was assessed both upstream and downstream of the Paris conurbation. Consequently, a sharp decrease in dissolved NP(1)EC concentrations relative to Seine River flow underscores the influence of single-point urban pollution on Seine River contamination. Conversely, dissolved 4-nonylphenol concentrations serve to reinforce the hypothesis of its widespread presence at the Seine River basin scale.
Afficher plus [+] Moins [-]Variation patterns in individual fish responses to chemical stress among estuaries, seasons and genders: the case of the European flounder (Platichthys flesus) in the Bay of Biscay Texte intégral
2013
Laroche, Jean | Gauthier, Olivier | Quiniou, Louis | Devaux, Alain | Bony, Sylvie | Evrard, Estérine | Cachot, Jerome | Cherel, Yan | Larcher, Thibaut | Riso, Ricardo, D. | Pichereau, Vianney | Devier, Marie-Hélène | Budzinski, Hélène | Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) ; Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) | Équipe 5 - Impacts des Polluants sur les Écosystèmes (LEHNA IPE) ; Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS) | Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux (Cedre) ; Cedre | Environnements et Paléoenvironnements OCéaniques (EPOC) ; École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) | Physiopathologie Animale et bioThérapie du muscle et du système nerveux (PAnTher) ; École nationale vétérinaire, agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Variation patterns in individual fish responses to chemical stress among estuaries, seasons and genders: the case of the European flounder (Platichthys flesus) in the Bay of Biscay Texte intégral
2013
Laroche, Jean | Gauthier, Olivier | Quiniou, Louis | Devaux, Alain | Bony, Sylvie | Evrard, Estérine | Cachot, Jerome | Cherel, Yan | Larcher, Thibaut | Riso, Ricardo, D. | Pichereau, Vianney | Devier, Marie-Hélène | Budzinski, Hélène | Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) ; Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) | Équipe 5 - Impacts des Polluants sur les Écosystèmes (LEHNA IPE) ; Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS) | Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux (Cedre) ; Cedre | Environnements et Paléoenvironnements OCéaniques (EPOC) ; École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) | Physiopathologie Animale et bioThérapie du muscle et du système nerveux (PAnTher) ; École nationale vétérinaire, agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
International audience | The objective was to describe and model varia- tion patterns in individual fish responses to contaminants among estuaries, season and gender. Two hundred twenty- seven adult European flounders were collected in two sea- sons (winter and summer) in four estuaries along the Bay of Biscay (South West France), focusing on a pristine system (the Ster), vs. three estuaries displaying contrasted levels of contaminants (the Vilaine, Loire and Gironde). Twenty-three variables were measured by fish, considering the load of contaminants (liver metals, liver and muscle persistent organic pollutants, muscle polycyclic aromatic hydrocar- bons); the gene expression (Cyt C oxydase, ATPase, BHMT, Cyt P450 1A1, ferritin); the blood genotoxicity (Comet test); and liver histology (foci of cellular alteration-tumour, steatosis, inflammation, abnormal glycogen storage). Ca- nonical redundancy analysis (RDA) was used to model these variables using gender, season and estuary of origin as explanatory variables. The results underlined the homo- geneity of fish responses within the pristine site (Ster) and more important seasonal variability within the three contam- inated systems. The complete model RDA was significant and explained 35 % of total variance. Estuary and season respectively explained 30 and 5 % of the total independent variation components, whilst gender was not a significant factor. The first axis of the RDA explains nearly 27 % of the total variance and mostly represents a gradient of contami- nation. The links between the load of contaminants, the expression of several genes and the biomarkers were ana- lysed considering different levels of chemical stress and a possible multi-stress, particularly in the Vilaine estuary.
Afficher plus [+] Moins [-]Variation patterns in individual fish responses to chemical stress among estuaries, seasons and genders: the case of the European flounder (Platichthys flesus) in the Bay of Biscay Texte intégral
2013
Laroche, Jean | Gauthier, Olivier | Quiniou, Louis | Devaux, Alain | Bony, Sylvie | Evrard, Estérine | Cachot, Jérôme | Chérel, Yan | Larcher, Thibaut | Riso, Ricardo | Pichereau, Vianney | Devier, Marie Hélène | Budzinski, Hélène
The objective was to describe and model variation patterns in individual fish responses to contaminants among estuaries, season and gender. Two hundred twenty-seven adult European flounders were collected in two seasons (winter and summer) in four estuaries along the Bay of Biscay (South West France), focusing on a pristine system (the Ster), vs. three estuaries displaying contrasted levels of contaminants (the Vilaine, Loire and Gironde). Twenty-three variables were measured by fish, considering the load of contaminants (liver metals, liver and muscle persistent organic pollutants, muscle polycyclic aromatic hydrocarbons); the gene expression (Cyt C oxydase, ATPase, BHMT, Cyt P450 1A1, ferritin); the blood genotoxicity (Comet test); and liver histology (foci of cellular alteration–tumour, steatosis, inflammation, abnormal glycogen storage). Canonical redundancy analysis (RDA) was used to model these variables using gender, season and estuary of origin as explanatory variables. The results underlined the homogeneity of fish responses within the pristine site (Ster) and more important seasonal variability within the three contaminated systems. The complete model RDA was significant and explained 35 % of total variance. Estuary and season respectively explained 30 and 5 % of the total independent variation components, whilst gender was not a significant factor. The first axis of the RDA explains nearly 27 % of the total variance and mostly represents a gradient of contamination. The links between the load of contaminants, the expression of several genes and the biomarkers were analysed considering different levels of chemical stress and a possible multi-stress, particularly in the Vilaine estuary.
Afficher plus [+] Moins [-]Variation patterns in individual fish responses to chemical stress among estuaries, seasons and genders: the case of the European flounder (Platichthys flesus) in the Bay of Biscay
2013
Laroche , Jean (Université Européenne de BretagneInstitut Universitaire Européen de la MerCentre National de la Recherche ScientifiqueInstitut Français de Recherche pour l'Exploitation de la MerLaboratoire des Sciences de l’Environnement Marin LEMARUBO,Université de Bretagne Occidentale,Brest (FRA)Institut Français de Recherche pour l'Exploitation de la Mer, PlouzanéPlouzané(France).) | Gauthier , Olivier (Laboratoire des Sciences de l’Environnement Marin LEMARInstitut Universitaire Européen de la MerUniversité Européenne de BretagneCentre National de la Recherche ScientifiqueUBO,Université de Bretagne Occidentale,Brest (FRA)Institut Français de Recherche pour l'Exploitation de la Mer(France). UMR 6539 ) | Quiniou , Louis (Laboratoire des Sciences de l’Environnement Marin LEMARInstitut Universitaire Européen de la MerUniversité Européenne de BretagneUBO,Université de Bretagne Occidentale,Brest (FRA)Institut Français de Recherche pour l'Exploitation de la Mer, Plouzané(France). UMR6539) | Devaux , Alain (INRA (France). ) | Bony , Sylvie (INRA , Marcy-L'Étoile (France). UMR 1233 Mycotoxines et Toxicologie Comparée des Xénobiotiques) | Evrard , Esterine (Centre de Recherches Européennes de Rennes(France).) | Cachot , Jérôme (Université de Bordeaux, Talence(France).) | Cherel , Yan (INRA , Nantes (France). UMR 0703 Physiopathologie animale et biothérapies du muscle et du système nerveux) | Larcher , Thibaut (INRA , Nantes (France). UMR 0703 Physiopathologie animale et biothérapies du muscle et du système nerveux) | Riso , Ricardo (Laboratoire des Sciences de l’Environnement Marin LEMARInstitut Universitaire Européen de la MerUniversité Européenne de BretagneUBO,Université de Bretagne Occidentale,Brest (FRA)Institut Français de Recherche pour l'Exploitation de la Mer, Plouzané(France). UMR 6539) | Pichereau , Vianney (Laboratoire des Sciences de l’Environnement Marin LEMARInstitut Universitaire Européen de la MerUniversité Européenne de BretagneInstitut Français de Recherche pour l'Exploitation de la MerUBO,Université de Bretagne Occidentale,Brest (FRA), Plouzané(France). UMR 6539) | Devier , Marie-Hélène (Université de Bordeaux(France). EPOC UMR 5805) | Budzinski , Hélène (Université Bordeaux 1, Talence(France). EPOC UMR 5805)
The objective was to describe and model varia- tion patterns in individual fish responses to contaminants among estuaries, season and gender. Two hundred twenty- seven adult European flounders were collected in two sea- sons (winter and summer) in four estuaries along the Bay of Biscay (South West France), focusing on a pristine system (the Ster), vs. three estuaries displaying contrasted levels of contaminants (the Vilaine, Loire and Gironde). Twenty-three variables were measured by fish, considering the load of contaminants (liver metals, liver and muscle persistent organic pollutants, muscle polycyclic aromatic hydrocar- bons); the gene expression (Cyt C oxydase, ATPase, BHMT, Cyt P450 1A1, ferritin); the blood genotoxicity (Comet test); and liver histology (foci of cellular alteration–tumour, steatosis, inflammation, abnormal glycogen storage). Ca- nonical redundancy analysis (RDA) was used to model these variables using gender, season and estuary of origin as explanatory variables. The results underlined the homo- geneity of fish responses within the pristine site (Ster) and more important seasonal variability within the three contam- inated systems. The complete model RDA was significant and explained 35 % of total variance. Estuary and season respectively explained 30 and 5 % of the total independent variation components, whilst gender was not a significant factor. The first axis of the RDA explains nearly 27 % of the total variance and mostly represents a gradient of contami- nation. The links between the load of contaminants, the expression of several genes and the biomarkers were ana- lysed considering different levels of chemical stress and a possible multi-stress, particularly in the Vilaine estuary.
Afficher plus [+] Moins [-]Variation patterns in individual fish responses to chemical stress among estuaries, seasons and genders: the case of the European flounder (Platichthys flesus) in the Bay of Biscay Texte intégral
2013
Laroche, Jean | Gauthier, Olivier | Quiniou, Louis | Devaux, Alain | Bony, Sylvie | Evrard, Estérine | Cachot, Jérôme | Cherel, Yan | Larcher, Thibaut | Riso, Ricardo | Pichereau, Vianney | Devier, Marie-Hélène | Budzinski, Hélène
The objective was to describe and model varia- tion patterns in individual fish responses to contaminants among estuaries, season and gender. Two hundred twenty- seven adult European flounders were collected in two sea- sons (winter and summer) in four estuaries along the Bay of Biscay (South West France), focusing on a pristine system (the Ster), vs. three estuaries displaying contrasted levels of contaminants (the Vilaine, Loire and Gironde). Twenty-three variables were measured by fish, considering the load of contaminants (liver metals, liver and muscle persistent organic pollutants, muscle polycyclic aromatic hydrocar- bons); the gene expression (Cyt C oxydase, ATPase, BHMT, Cyt P450 1A1, ferritin); the blood genotoxicity (Comet test); and liver histology (foci of cellular alteration–tumour, steatosis, inflammation, abnormal glycogen storage). Ca- nonical redundancy analysis (RDA) was used to model these variables using gender, season and estuary of origin as explanatory variables. The results underlined the homo- geneity of fish responses within the pristine site (Ster) and more important seasonal variability within the three contam- inated systems. The complete model RDA was significant and explained 35 % of total variance. Estuary and season respectively explained 30 and 5 % of the total independent variation components, whilst gender was not a significant factor. The first axis of the RDA explains nearly 27 % of the total variance and mostly represents a gradient of contami- nation. The links between the load of contaminants, the expression of several genes and the biomarkers were ana- lysed considering different levels of chemical stress and a possible multi-stress, particularly in the Vilaine estuary.
Afficher plus [+] Moins [-]Xenobiotics removal by adsorption in the context of tertiary treatment: a mini review Texte intégral
2013
Tahar, A. | Choubert, J.M. | Coquery, Marina | Milieux aquatiques, écologie et pollutions (UR MALY) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)
[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]TED [Axe_IRSTEA]TED-SOWASTE [Axe_IRSTEA]TED-EPURE | Many xenobiotics, including several pharmaceuticals and pesticides, are poorly treated in domestic wastewater treatment plants. Adsorption processes, such as with activated carbons, could be a solution to curb their discharge into the aquatic environment. As adsorbent-like activated carbon is known to be expensive, identifying promising alternative adsorbent materials is a key challenge for efficient yet affordable xenobiotic removal from wastewaters. As part of the effort to address this challenge, we surveyed the literature on pharmaceutical and pesticide xenobiotics and built a database compiling data from 38 scientific publications covering 65 xenobiotics and 58 materials. Special focus was given to the relevance and comparability of the data to the characteristics of the adsorbent materials used and to the operating conditions of the batch tests inventoried. This paper gives an in-depth overview of the adsorption capacities of various adsorbents. The little data on alternative adsorbent materials, especially for the adsorption of pharmaceuticals, makes it difficult to single out any one activated carbon alternative capable of adsorbing pesticides and pharmaceuticals at the tertiary stage of treatment. There is a pressing need for further lab-scale experiments to investigate the tertiary treatment of discharged effluents. We conclude with recommendations on how future data should best be used and interpreted.
Afficher plus [+] Moins [-]Exposure of juvenile Danio rerio to aged TiO2 nanomaterial from sunscreen Texte intégral
2013
Fouqueray, Manuela | Noury, Patrice | Dherret, Lysiane | Chaurand, Perrine | Abbaci, Khedidja | Labille, Jérôme | Rose, Jérôme | Garric, Jeanne | Milieux aquatiques, écologie et pollutions (UR MALY) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) ; Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
[Departement_IRSTEA]Eaux [TR1_IRSTEA]BELCA | International audience | The toxicity of dietary exposure to artificially aged TiO2 nanomaterial (T-Lite (TM)) used in sunscreen cream was studied on Danio rerio. Embryolarval assays were conducted to assess the effects of TiO2 residues of nanomaterial (RNM) on fish early life stages. Juvenile fishes were exposed by the trophic route in two experiments. During the first experiment, juvenile fishes were exposed to TiO2 RNM for 14 days by adding RNM to commercial fish food. The second one consisted in producing a trophic food chain. Pseudokirchneriella subcapitata algae, previously contaminated with TiO2 RNM in growth medium, was used to feed Daphnia magna neonates over a 48-h period. Daphnia were used next to feed juvenile fishes for 7 days. Accumulation of Ti, life traits (survival and growth) and biochemical parameters such as energy reserves, digestive (trypsin, esterase, cellulose and amylase) and antioxidant (superoxide dismutase and catalase) enzyme activity were measured at the end of exposures. As expected in the receiving aquatic system, TiO2 RNM at low concentrations caused a low impact on juvenile zebrafish. A slight impact on the early life stage of zebrafish with premature hatching was observed, and this effect appeared mainly indirect, due to possible embryo hypoxia. When juvenile fish are exposed to contaminated food, digestive enzyme activity indicated a negative effect of TiO2 RNM. Digestive physiology was altered after 14 days of exposure and seemed to be an indirect target of TiO2 RNM when provided by food.
Afficher plus [+] Moins [-]Risk assessment of herbicides and booster biocides along estuarine continuums in the Bay of Vilaine area (Brittany, France) | L'évaluation du risque écotoxique d'herbicides et de biocides le long du continuum de l'estuaire de la baie de Vilaine (Bretagne, France) Texte intégral
2013
Caquet, Thierry | Roucaute, Marc | Mazzella, Nicolas | Delmas, François | Madigou, Céline | Farcy, E. | Burgeot, Thierry | Allenou, J.P. | Gabellec, R. | Institut National de la Recherche Agronomique (INRA) | Réseaux épuration et qualité des eaux (UR REBX) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Hydrosystèmes et Bioprocédés (UR HBAN) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
[Departement_IRSTEA]Eaux [TR1_IRSTEA]BELCA | International audience | Estuarine areas represent complex and highly changing environments at the interface between freshwater and marine aquatic ecosystems. Therefore, the aquatic organisms living in estuaries have to face highly variable environmental conditions. The aimof this work was to study the influence of environmental changes from either natural or anthropogenic origins on the physiological responses of Mytilus edulis. Mussels were collected in theVilaine estuary during early summer because this season represents a critical period of active reproduction in mussels and of increased anthropogenic inputs from agricultural and boating activities into the estuary. The physiological status of the mussel M. edulis was evaluated through measurements of a suite of biomarkers related to: oxidative stress (catalase, malondialdehyde), detoxication (benzopyrene hydroxylase, carboxylesterase), neurotoxicity (acetylcholinesterase), reproductive cycle (vitelline, condition index, maturation stages), immunotoxicity (hemocyte concentration, granulocyte percentage, phagocytosis, reactive oxygen species production, oxidative burst), and general physiological stress (lysosomal stability). A selection of relevant organic contaminant (pesticides, (polycyclic aromatic hydrocarbons, polychlorobiphenyls) was measured as well as environmental parameters (water temperature, salinity, total suspended solids, turbidity, chlorophyll a, pheopigments) and mussel phycotoxin contamination. Two locations differently exposed to the plume of the Vilaine River were compared. Both temporal and inter-site variations of these biomarkers were studied. Our results show that reproduction cycle and environmental parameters such as temperature, organic ontaminants, and algal blooms could strongly influence the biomarker responses. These observations highlight the necessity to conduct integrated environmental approaches in order to better understand the causes of biomarker variations.
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