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| Registros recuperados: 54 | |
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| Abdou, M.; Schaefer, J.; Cobelo-garcia, A.; Neira, P.; Petit, J. C. J.; Auger, Dominique; Chiffoleau, Jean-francois; Blanc, Gerard. |
| Platinum Group Metals (PGM) are modern, technologically relevant elements for which (i) the anthropogenic cycle has outcompeted the natural cycles and (ii) environmental behavior, fate and impact are still widely unknown. Stripping voltammetry was used for accurate determinations of platinum (Pt) in historical records of river sediments and estuarine oysters from the Gironde fluvial-estuarine continuum (SW France) comprising the Lot River. Sediment cores from the Lot River, dated from 1952 to 2001, showed past Pt contamination due to former industrial (smelter) activities in the Lot River watershed. These samples revealed the phasing-out of a historical Pt contamination with Pt/Th (Thorium) values of 11 × 10− 5 ± 0.79 × 10− 5 for the deepest part of the... |
| Tipo: Text |
Palavras-chave: Platinum; Sediments; Wild oysters; Bioaccumulation. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00311/42177/41478.pdf |
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| Abdou, Melina; Schafer, Jorg; Hu, Ruoyu; Gil-diaz, Teba; Garnier, Cedric; Brach-papa, Christophe; Chiffoleau, Jean-francois; Charmasson, Sabine; Giner, Franck; Dutruch, Lionel; Blanc, Gerard. |
| Platinum (Pt) is considered a Technology Critical Element (TCE) and an emerging metallic contaminant with increasing release into the environment. Gaps in knowledge and understanding of environmental levels, fate and effects of Pt still exist, especially in the marine environment. This work presents Pt concentrations in the northwestern Mediterranean coast including: (i) temporal variability from sediment cores and farmed mussels in the Toulon Bay (historically affected by intense human activities) and (ii) spatial distribution from recent wild mussels collected along ∼ 300 km coastline with contrasting ecosystems (including natural reserves), quantified using voltammetry and inductively coupled plasma-mass spectrometry. The historical (> 100 years)... |
| Tipo: Text |
Palavras-chave: Platinum; Sediments; Mussels; Biomonitoring; Mediterranean coast. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00460/57134/59055.pdf |
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| Abi Ghanem, Carine; Chiffoleau, Jean-francois; Bermond, A.; Nakhle, K.; Khalaf, G.; Borschneck, D.; Cossa, Daniel. |
| Lead concentrations and isotopic composition of sediment samples collected from three sites within the Lebanese coastal zones were measured: at Akkar, Dora and Selaata. Akkar is located far from any direct source of contamination, while Dora and Selaata receive urban and industrial wastes, respectively. Low Pb concentrations (6-16 mu g g(-1)) were detected in the Akkar sediments, and high concentrations of Pb (70-101 mu g g(-1)) were detected in the Dora sediments. Measuring stable isotope ratios of Pb makes it possible to identify the principal sources of Pb in the Akkar sediments as Pb emitted from gasoline combustion and Pb originating from natural sources. On the other hand, Pb stable isotopic ratios in Dora sediments indicate that they are more highly... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7326.pdf |
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| Alzieu, Claude; Abarnou, Alain; Bassoullet, Philippe; Boutier, Bernard; Chiffoleau, Jean-francois; Crenn, Isabelle; Derrien, Annick; Erard-le Denn, Evelyne; Gourmelon, Michele; Guiliaud, Jean-françois; Silva Jacinto, Ricardo; Le Cann, Pierre; Le Guyader, Françoise; Le Hir, Pierre; L'Yavanc, Jacky; Mauvais, Jean-louis; Menard, Dominique; Michel, Pierre; Monbet, Yves; Pommepuy, Monique; Quiniou, Francoise. |
| Port activities require continuous or occasional dredging of considerable quantities of sediments : approximately 50 million m3 along the French coastline. A large proportion of the dredgings is authorized for dumping at sea in geographically delimited areas and following an impact evaluation of their potential harmfulness to the marine environment. The environmental risks assessment linked to dredging operations relies on knowledge related to several scientific disciplines contributing to changes in the regulations. This work, intended both for managers and for environmental scientists and engineers, is designed to take stock of the current state-of-the-art in the field of sediment contamination and related ecotoxicological hazards, along with a review of... |
| Tipo: Text |
Palavras-chave: Regulations; Management; Impact; Contaminants; Dredging; Réglementation; Gestion; Impact; Contaminants; Dragages. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-1040.pdf |
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| Anajjar, E; Chiffoleau, Jean-francois; Bergayou, H; Moukrim, A; Burgeot, Thierry; Cheggour, M. |
| Concentrations of seven metals (Cd, Cu, Cr, Pb, Ni, Zn, Hg) were monitored monthly during 2 years in two bivalves, Cerastoderma edule and Scrobicularia plana collected from the Souss estuary (South Morocco) before and after the commissioning of a sewage treatment plant in November 2002. According to trace metals, changes in concentrations were observed mainly in S. plana, characterised by a decrease of Cu, Hg and Pb when Cd was clearly increasing. Conversely, no clear changes were observed in C. edule during the same periods. This study suggests the use of S. plana in the monitoring of trace metal contamination of such coastal marine environments. |
| Tipo: Text |
Palavras-chave: Monitoring; Waste water; Bivalves; Metals; South estuary. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4515.pdf |
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| Azdi, M.; Moukrim, A.; Burgeot, Thierry; Budzinski, H.; Chiffoleau, Jean-francois; Kaaya, A.; Zekhnini, A.; Narbonne, J. F.; Guarrigues, Ph.. |
| Specimens of the mussel Perna perna were collected along Moroccan coasts to determine the concentrations of polycyclic aromatic hydrocarbons ( PAHs) bioaccumulated in the tissues, and to measure benzo[ a] pyrene hydroxylase (BPH) activity. Chemical analysis of PAHs show that the Mediterranean (Nador, Martil, Tanger) and central Atlantic coasts ( from Rabat to Jorf Lihoudi) are those most contaminated ( 351 245 ng.g(-1) dry weight in Tanger). The mussel contaminants were of mixed origin for most of the locations with non negligible inputs of petrogenic origin in many of them. Baseline levels of PAHs were between 6 and 55 ng.g(-1) dry weight. BPH activity showed significant correlation (r(s) = 0.64, P < 0.05) with total PAH concentrations at the six most... |
| Tipo: Text |
Palavras-chave: Mussel; Perna perna; Moroccan coasts; Polycyclic aromatic hydrocarbons; Benzoapyrene hydroxylase; Baseline level. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00000/10995/12929.pdf |
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| Boulben, Sylviane; Monfort, Patrick; Piquet, Jean-come; Chiffoleau, Jean-francois; Le Bec, Claude. |
| Expertise de l’IFREMER sur la qualité microbiologique de 6 zones de récolte d’algues dans le cadre du projet ALGMARBIO, localisées en Finistère nord en baie d’Audierne, à Ploudalmezeau, au large des Abers, à Guissény, à Plouescat et à Roscoff. |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00252/36340/79157.pdf |
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| Boutier, Bernard; Chiffoleau, Jean-francois. |
| La répartition du cadmium dans l'eau, le sédiment et la matière en suspension de la Gironde, du proche plateau cohtinental et de la baie de Marennes-Oléron a été étudiée lors de trois campagnes réalisées en conditions de débits moyens ou d'étiage de la Garonne et de la Dordogne. Des apports anormaux de cadmium particulaire par la Garonne ont été mis en évidence. Après désorption ou solubilisation, ils sont expulsés sous forme dissoute, formant un panache très net mais peu étendu en dehors duquel les concentrations en cadmium dissous sont conformes aux valeurs habituellement observées en milieu côtier. Les teneurs en cadmium dissous du bas estuaire expliquent les fortes concentrations relevées dans les huîtres de ce secteur. Le caractère récent de la... |
| Tipo: Text |
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| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00105/21583/19163.pdf |
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| Brach-papa, Christophe; Chiffoleau, Jean-francois; Knoery, Joel; Chouvelon, Tiphaine; Auger, Dominique; Bretaudeau-sanjuan, Jane; Crochet, Sylvette; Rozuel, Emmanuelle; Thomas, Bastien; Vasileva, Emilia; Oriana, Anna Maria. |
| The Loire River is one of the largest river systems in Western Europe and a major source of continental inputs to the marine environment in the Bay of Biscay. Its catchment area drains agricultural and industrial zones and its estuary is increasingly urbanized. Even if the Loire River is not considered as a highly polluted system, studies have shown estuarine Pb contamination due to industrial inputs and combustion of leaded gasoline until the mid 1990’s. A retrospective study, based on the analysis (Pb levels and isotopic composition) of mussel samples collected by the French mussel watch program (RNO/ROCCH) has highlighted this contamination and its trend between 1985-2005 (Couture et al., 2010). This poster furthers the work initiated by Couture et al.... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00188/29958/28404.pdf |
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| Briant, Nicolas; Chouvelon, Tiphaine; Brach-papa, Christophe; Chiffoleau, Jean-francois; Savoye, Nicolas; Sonke, Jeroen; Knoery, Joel. |
| Mercury (Hg) is a natural element toxic to all living organisms. Its ocean biogeochemical cycle is dominated by atmospheric deposition, which human activities contribute to disrupt signi cantly, and to a lesser extent by riverine discharge. This element is bioamplifed and bioaccumulated in marine food webs. since mercury concentrations in some coastal animal species of high trophic level approach sanitary thresholds, understanding biogeochemical processes and mechanisms leading to these elevated Hg concentrations becomes important. The stable isotopic geochemistry of metal is indeed a very promising way to trace processes and transfers from one mercury biogeochemical reservoir to another (Sonke and Blum, 2013). The stable isotopes of Hg undergo... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00394/50561/51253.pdf |
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| Briant, Nicolas; Chouvelon, Tiphaine; Martinez, Laura; Brach-papa, Christophe; Chiffoleau, Jean-francois; Savoye, N.; Sonke, J.; Knoery, Joel. |
| Marine mercury (Hg) concentrations have been monitored in the French coastline for the last half a century using bivalves. The analyses presented in this study concerned 192 samples of bivalves (mussels: Mytilus edulis and Mytilus galloprovincialis and oysters: Crassostrea gigas and Isognomon alatus) from 77 sampling stations along the French coast and in the French Antilles sea. The goals of this study were to assess MeHg levels in various common bivalves from French coastline, and to identify possible geographic, taxonomic or temporal variations of concentrations. We show that the evolution of methylmercury (MeHg) concentrations covary with total mercury (HgT) concentrations. Moreover, in most of the study sites, HgT concentrations have not decreased... |
| Tipo: Text |
Palavras-chave: Mercury; Methylmercury; France; Bivalves; Speciation. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00353/46465/46398.pdf |
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| Briant, Nicolas; Knoery, Joel; Chouvelon, Tiphaine; Brach-papa, Christophe; Chiffoleau, Jean-francois; Savoye, Nicolas; Sonke, Jeroen. |
| Mercury cycles between atmosphere, terrestrial and aquatic reservoirs through a complex combination of transport and transformation processes, until it is buried in oceanic or terrestrial sediments. Monomethylmercury is the main species bioaccumulated and bioampli ed in the food chain. Knowledge of the origin (continental, oceanicorlocalsediment)ofthisspeciesforthelittoralenvironnment can still be improved. This study focuses on ~200 samples of bivalves (mussels: Mytilus edulis and Mytilus galloprovincialis and oysters: Crassostrea gigas and Isognomon alatus) from ~80 stations along the French coast. The goals of this study were i) to describe Hg levels, speciation and isotopic composition in various bioindicator bivalves from the French coastline, and ii)... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00394/50562/51254.pdf |
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| Chiffoleau, Jean-francois. |
| Le ROCCH (Réseau d’Observatoire de la Contamination CHimique) est un observatoire de la contamination chimique du milieu marin littoral mis en place par le ministère chargé de l’Environnement à la fin des années 70 et mis en œuvre par IFREMER. Son objectif est de décrire les distributions de contaminants chimiques sélectionnés sur les côtes de France métropolitaine et certaines régions ultra-marines, et de suivre leur évolution temporelle. La stratégie consiste à mesurer ces contaminants dans des matrices intégratrices, tissus d’organismes inféodés à ces régions ou sédiments de surface. Depuis la fin des années 80, le ROCCH fournit des données environnementales aux conventions des mers régionales (convention OSPAR pour la Manche et l’Atlantique, convention... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00405/51617/52170.pdf |
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| Chiffoleau, Jean-francois; Auger, Dominique; Roux, Nathalie; Rozuel, Emmanuelle; Santini, Anne. |
| Distribution and behavior of many trace elements in the aquatic environment has been well characterized, but little is known about silver (Ag) concentrations in coastal waters, even though this element ranks among the most toxic to marine invertebrates (Calabrese et al., 1977 ; Fisher and Hook, 1997 ; Webb and Wood, 1998). Studies conducted by Flegal et al. (1995), River-Duarte et al. (1999), and Ndung'u et al. (2001), provided the first valuable data on Ag distribution in the oceanic environment, indicating that this element is found in very low concentrations in the dissolved phase. However, although silver concentrations in coastal waters do not reach the nanomolar range (Smith and Flegal, 1993 ; Squire et al., 2002), formation of a stable chloro... |
| Tipo: Text |
Palavras-chave: Mollusks; Coastal water; Silver; Monitoring. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-2553.pdf |
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| Registros recuperados: 54 | |
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