|
|
|
| Registros recuperados: 32 | |
|
| |
|
| |
|
|
| Michel, Pierre. |
| On November 17th 1975, the tanker "Port de Bouc" with 1 700 t. of fuel n° 2 on board run aground in Saint-Brieuc Bight and 470 t. of this product escaped. The mussel farming zones situated between 10 and 20 km from the oil spill place were rapidly polluted within a few days. The appraised mussels value was 2 millions US dollars. A regular survey of the situation was made and 52 samples were analysed. After 3 days, the maximum of contamination was measured in a sample (505 mg/kg of wet flesh against 16 mg/kg in a non polluted check sample) the maximum pollution for the whole bight was measured after 15 days (the average was 220 mg/kg). First, the release was fast during 1 month and characterized by the total elimination of n-paraffins. Nevertheless, the... |
| Tipo: Text |
|
| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/publication-7121.pdf |
| |
|
|
| Michel, Pierre; Abarnou, Alain. |
| La campagne "Gino II" réalisée par l'I.S.T.P.M. en avril 1981 à bord du N/O "Pelagia", et les études en laboratoire qui ont suivi, permettent de faire le point de la contamination et de noter l'évolution. - Dans les sédiments, à la périphérie d'une nappe de Carbon Black oil dont la surface est restreinte, on peut noter une contamination parfaitement discernable dans un cercle de 8 milles de rayon. Le niveau de contamination y est toutefois peu élevé. A l'extérieur de ce cercle, aucune contamination n'a été décelée. - Les crustacés pêchés dans les parages immédiats de l'épave contiennent de faibles traces d'hydrocarbures au niveau des branchies et de l'hépatopancréas. Bien que les taux d'hydrocarbures dans les oeufs soient négligeables et que l'examen... |
| Tipo: Text |
|
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00046/15678/13081.pdf |
| |
|
|
| 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 |
| |
|
|
| Cossa, Daniel; Michel, Pierre; Noel, Joelle; Auger, Dominique. |
| Mercury (total mercury), arsenic, cadmium, copper and nutrient concentration profiles (fourteen depths) were obtained at the ICES (International Council for the Exploration of the Sea) reference station (46-degrees-N; 6-degrees-W) in 4 680 m of water in the northeastern Atlantic Ocean. Concentrations of mercury generally ranged from 0.4 to 10 pM. The main feature of the vertical mercury profile was a broad peak between 150 and 1 500 m. Examination of the mercury profile in relation to water mass structure and comparison with nutrient and other elemental distributions suggested that its shape results from a remobilization of mercury during mineralization of sinking organic detritus combined with its intense scavenging in deeper waters. |
| Tipo: Text |
|
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00101/21185/18802.pdf |
| |
|
| |
|
|
| Michel, Pierre; Averty, Bernard; Noel, Joelle; Sanjuan, Jane. |
| In order to estimate arsenic flux from the English Channel toward the North Sea, 168 samples were obtained from September 1990 to November 1991 along a transect between Boulogne and Folkestone comprising six stations and two depths. Organic and inorganic arsenic were measured in dissolved phase and total arsenic in suspended particles. The mean concentration of dissolved total arsenic in water was 1.38 +/- 0.12 mug.l-1. The variability of measured concentrations was low, particularly for the four intermediate stations. Results were slightly more sensitive for English (1.38 +/- 0.12 mug.l-1) and French (135 +/- 0.11 mug.l-1) coastal stations due to exchanges with shallower sediments. Dissolved organic arsenic was nearly negligible from December to March... |
| Tipo: Text |
Palavras-chave: ARSENIC MMA; DMA TRACE ELEMENTS ENGLISH CHANNEL NORTH SEA. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21079/18704.pdf |
| |
|
| |
|
|
| Michel, Pierre. |
| Arsenic levels of in the marine environment are high in comparison with other contaminants. Over the past twenty years, a large number of arsenic organic compounds have been identified in the water, sediments and living species. This document constitutes a synthesis of current knowledge on arsenic sources, and contamination levels, on its biogeochemical cycle as well as its toxic effects on human and marine fauna. This paper highlights in particular the effects of phosynthesis on arsenic speciation and its distribution throughout the marine environment. Problems of toxicity in the case of certain phyto- and zooplankton species are identified. Bioaccumulation in seaweeds, molluscs and fishes is documented as well, with special attention to the species... |
| Tipo: Text |
Palavras-chave: Ecotoxicology; Contamination; Biogeochemistry; Arsenic; Ecotoxicologie; Contamination; Biogéochimie; Arsenic. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/rapport-1448.pdf |
| |
|
|
| Michel, Pierre. |
| Standard methods were used to assess the effectiveness of 101 products for use against oil slicks. Products were emulsifiers, agglomerants or precipitants and were tested against oil from Edjele, Kuwait and Syria. For each kind of product, a review is given of the previous tests, the choice of methods is discussed, the methodology is described, and results are presented and interpreted. In addition, the relationship between physical properties and effectiveness is discussed, with graphical examples and the advantages and disadvantages are indicated. It is concluded that at present no 'miracle' product exists for use in this field. Agglomerating powders would be ideal were it not for problems in putting them to use, and, wind because of the need to use them... |
| Tipo: Text |
Palavras-chave: Efficiency; Choice of products; Oil spills; Pollution. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2072.pdf |
| |
| Registros recuperados: 32 | |
|
|
|
