|
|
|
| Registros recuperados: 15 | |
|
|
| Michel, Pierre; Boutier, Bernard; Herbland, Alain; Averty, Bernard; Artigas, Lf; Auger, Dominique; Chartier, E. |
| The arsenic (As) cycle in the marine environment is known to be sensitive to biological activity. Within the scope of the National Coastal Oceanography Program, we undertook a specific study of the behaviour of this element in a water column on the continental shelf of the Bay of Biscay off the Gironde estuary during two oceanographic cruises conducted in May 1994 and May 1995. Various chemical forms were measured: arsenite (As3), at-senate (As5), monomethylarsenic (MMA), dimethylarsenic (DMA) and dissolved total As after ultraviolet mineralization. The net flux of total As from the Gironde estuary was evaluated as well as its effect on the concentration in surface marine waters. The vertical profiles in the coastal zone during a period of active primary... |
| Tipo: Text |
Palavras-chave: Arsenic; Phytoplankton; Speciation; Gironde plume; Biscay Bay. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/1998/publication-851.pdf |
| |
|
|
| Gonzalez, Jean-louis; Boutier, Bernard; Chiffoleau, Jean-francois; Auger, Dominique; Noel, Joelle; Truquet, Isabelle. |
| The study of Cd and Hg distribution in the sediments, water and suspended matter of the Bay of Marennes-Oléron provided the opportunity to identify the factors governing the distribution of these two contaminants throughout the bay. On one hand, these elements are associated with the continental inputs from the Charente river which settle on arrivaI at the mouth of the estuary and in the eastern part of the bay. The Cd and Hg present in these deposits are associated with POC, as weIl as with Mn and Fe oxides and hydroxides. On the other hand, a portion of the dissolved inputs is recycled in the bay waters through phytoplankton activity. This mechanism contributes, particularly in the case of Cd, to increased particulate metal fluxes from the water column... |
| Tipo: Text |
Palavras-chave: Baie de Marennes-Oléron; Métaux lourds; Sédiments; MES; Activité phytoplanctonique; BAY OF MARENNES-OLERON; HEAVY METALS; SEDIMENTS; SUSPENDED MATTER; PHYTOPLANKTON ACTIVITY. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00085/19604/17242.pdf |
| |
|
|
| 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 |
| |
|
| |
|
|
| Jouanneau, J.-m.; Berger, P; Boutier, Bernard; Ewald, M; Fontugne, M; Heral, Maurice. |
| The PLACAR cruise, which took place after the first autumn floodings on the inner Aquitaine shelf, permitted to determine the outspread of solid and liquid inputs originating from the Gironde in superficial waters. In addition to the classical evaluations (S. ppt., P.O.C., nutritive salt) and S.E.M. observations, the researchers carried out detailed analyses of D.O.C., isotopic composition of P.O.C. delta super(13)C, dissolved fulvic acids and metals. |
| Tipo: Text |
Palavras-chave: Biscay Bay ANE; France Salts Salinity Water temperature Suspended organic matter Estuarine dynamics. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/publication-1830.pdf |
| |
|
| |
|
| |
|
|
| Claisse, Didier; Boutier, Bernard; Aranda, Alain. |
| High levels of cadmium in soft parts of mussels from the Bages-Sigean pond (located to the south of Narbonne, France) have been identified by the National Chemical Monitoring Network (Réseau National d'Observation de la Qualité du Milieu Marin, RNO). To explain this situation, a sampling of water, sediments, and mussels was organised in April 1990. Very high concentrations of dissolved cadmium have been measured in the pond waters and in some of its drainage basin canals (32.4 to 998.0 ng.l-1). This heavy contamination seems to come from an industrial zone located along the Tauran canal, above Narbonne, and shows the same exceptional feature than the pollution of the Gironde estuary. |
| Tipo: Text |
|
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00016/12696/9616.pdf |
| |
|
|
| 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 |
|
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00105/21583/19163.pdf |
| |
|
| |
|
|
| Alzieu, Claude; Andral, Bruno; Bassoullet, Philippe; Boutier, Bernard; Gonzalez, Jean-louis; Huet, Martial; Jestin, Herve; L'Yavanc, Jacky; Michel, Pierre; Paulet, Yves-marie; Quiniou, Francoise; Silva Jacinto, Ricardo. |
| Le projet à pour but de modéliser la dispersion des immersions des boues de dragage, à partir de modèles numériques de manière à pouvoir évaluer le devenir de la charge particulaire et des contaminants associés. Les résultats des expérimentations en laboratoire montrent, qu'à l'échelle représentative du temps de séjour des particules dans la colonne d'eau du champ proche (quelques heures), on ne constate pas de solubilisation des métaux. La libération de la fraction associée aux eaux interstitielles et les flux à l'interface eau-sédiment (diagenèse précoce) après dépôt des sédiments rejetés, sont les processus qui pourraient être la cause d'un apport important de Cd (ou autre contaminant) dissous dans le milieu. Les hypothèses retenues pour l'élaboration... |
| Tipo: Text |
|
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00075/18621/16172.pdf |
| |
|
|
| Boutier, Bernard. |
| Depuis sa création, le RNO matière vivante surveille les niveaux de présence des métaux lourds chez les mollusques filtreurs du littoral français (Crassostrea gigas, Mytilus edulis). Par leur aptitude à accumuler certains polluants dans leurs tissus, ces animaux donnent en effet de bonnes indications sur la qualité du milieu où ils vivent, tout en atténuant notablement les variations à court terme caractéristiques du milieu aquatique (PHILLIPS DJH, 1976-1977 ; DARRACOTT A. et WATLING H. , 1975). Dès les premières campagnes RNO (BOUTIER, 1981), les huîtres prélevées en Gironde se sont révélées très chargées en métaux, notamment en Cadmium, dont la toxicité pour l'homme et les animaux supérieurs est bien établie (troubles rénaux, maladie dite "ITAI-ITAI"). |
| Tipo: Text |
|
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/00103/21464/19045.pdf |
| |
|
|
| Boutier, Bernard; Quintin, Jean-yves; Rozuel, Emmanuelle; Auger, Dominique; Bretaudeau-sanjuan, Jane. |
| Two cores were sampled in the Bay of Biscay: one a few miles off the Gironde estuary (pointe de la Coubre), the other near the Spanish border (Capbreton canyon) to study past variations in sediment contamination. Radiochronology (210Pb, 137Cs) and total metal determinations by ICP-MS allowed the study of time trends for metal concentrations in sediment. Off the Gironde, during the time interval recorded by the core (1958–1999), all metal concentrations remained less than OSPAR background values. Some variations occurred along the Cd and Zn profiles, which may correspond to a very attenuated signal from the Gironde outputs. This suggests that this area was not submitted to any significant anthropogenic input of metals between 1958 and 1999. In the canyon of... |
| Tipo: Text |
Palavras-chave: Sediment; Metal contamination; Dating; Cores; Time trends. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00061/17254/16094.pdf |
| |
|
|
| Gonzalez, Jean-louis; Thouvenin, Benedicte; Dange, Catherine; Chiffoleau, Jean-francois; Boutier, Bernard. |
| The role of particles in the fate and speciation of trace metals in macrotidal estuaries was studied using a surface complexation model (MOCO). Cadmium was selected as the target metal contaminant due to its reactivity in estuaries: cadmium behavior is mainly controlled by heterogeneous processes (sorption/desorption) related to salinity and suspended matter gradients. Various scenarios of suspended matter distribution according to salinity were simulated. The impact of surface properties (specific surface area, density of surface sites, acido-basic properties, and complexation constant) was evaluated using data collected on particles from the Gironde, Loire, and Seine estuaries. Our results show that particle surface properties, evaluated on the basis... |
| Tipo: Text |
Palavras-chave: Turbidity maximum; Speciation; Sorption; Particles; Modeling; Macrotidal estuaries; Cadmium. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2005.pdf |
| |
|
|
| Boutier, Bernard. |
| Au cours de l'année 1979, la surveillance des niveaux de présence des métaux et micropolluants dans les organismes marins, pratiquée dans le cadre du Réseau national d'Observation, est venue compléter les résultats obtenus jusqu'alors dans l'eau de mer et le sédiment. La propriété qu'ont certains organismes marins d'accumuler les métaux toxiques présents à l'état de traces dans l'eau de mer a été utilisée pour cerner les teneurs naturelles et celles que l'on peut attribuer à des rejets. La recherche dans ces animaux des composés organochlorés et de certains hydrocarbures, qui n'ont pas diorigine naturelle dans le milieu, permet de déceler leur présence dans l'eau à des teneurs très basses, difficilement accessibles à l'analyse directe. Nous nous sommes... |
| Tipo: Text |
|
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00045/15672/13075.pdf |
| |
| Registros recuperados: 15 | |
|
|
|
