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Zn element ph12/7/2023 ![]() The second set of samples was taken from the Nautile manned submersible, to which a hydrographic bottle was attached. These bottles were used at four stations to collect water from 0, 5, 10, 20, 50, 100 and 190 m depth. The first set of samples was collected from the R/V Atalante, which, as it was assigned to observe the wreckage, only had 200 m of wire suitable for the hydro-graphic bottles (1.7 L General Oceanics). The samples were collected during 4-8 December 2002, both in the water column close to the ocean surface over the vertical of the tanker wreckage and in bottom waters close to where the bow and stern of the tanker lie. ![]() In the area comprised by the two fragments of the sunken Prestige, 32 water column samples were taken and analyzed for total zinc concentrations. The satellite photos taken of the ocean surface in the area of the Prestige shipwreck showed several oil patches for this reason, SASEMAR (Sociedad Española de Salvamento y Seguridad Marítima) planned the PRESTINAUT campaign in order to evaluate, among other matters, the potential contamination of the water column. The unrefined oil transported by the Prestige tanker contains, based on emulsion analysis, approximately 1 ppm of zinc. The presence of metals (including zinc) in the oil spilt off the coast of Kuwait during the Gulf War has been indicted as one of the major causes of the coastal contamination (Bu-Olayan et al., 1998). The occurrence of heavy metals in the oil is consubstantial to its origin (up to 0.03% of metals Marañón, 2000). However, zinc contamination in oceanic waters is atypical. This increase has been detected in several points along the Galician coast (Prego and Cobelo-García, 2003). Contamination by this metal normally occurs in the coastal systems impacted by urban and industrial effluents (Nriagu and Pacyna, 1988) that cause an increase of its concentration in the water column and sediments. Concentrations of zinc in ocean waters range from 0.05 to 9 nM, with an average value of 6 nM (Millero and Sohn, 1992). Zinc is a relatively abundant element in the environment (70 µg g -1 in the continental crust Wedepohl, 1991) and is essential for living organisms. Palabras clave: zinc, derrame de fuel, agua de mar, Océano Atlántico Noreste. El zinc resulta, además, un buen trazador para detectar la presencia de fuel en zonas limpias de manchas. Se detecta, pues, una contaminación por este metal contenido en el fuel vertido procedente de los tanques del buque hundido. Las concentraciones totales de zinc obtenidas oscilaron entre 14 y 571 nM, esto es, de uno a dos órdenes de magnitud superiores a las normales en esas aguas (0.2-3.2 nM). Para ello se tomaron muestras en la columna de agua (0-190 m) y en el fondo marino -en las proximidades de la proa y popa- donde yace el petrolero (3530-3820 m). Key words: zinc, oil spill, seawater, Northeast Atlantic Ocean.ĭieciséis días después del hundimiento del petrolero Prestige en el Atlántico Noreste (zona 42☁1' N, 12☀2' W) se llevó a cabo una campaña de muestreo en la columna de agua adyacente para evaluar la posible contaminación de zinc debido al fuel derramado al agua. Zinc was also found to be a good tracer to detect the presence of fuel in those areas free of patches. Therefore, a contamination by this metal, contained in the oil spilt from the tanks of the sunken ship, was detected. Total zinc concentrations found ranged from 14 to 571 nM, which are from one to two orders of magnitude higher than typical concentrations in these waters (0.2-3.2 nM). Samples were taken in the water column (0-190 m) and in bottom waters -in the vicinity of the bow and stern- where the tanker lies (3520-3820 m). Sixteen days after the Prestige tanker sank in the Northeast Atlantic (42☁1' N, 12☀2' W), a sampling campaign in the neighbouring water column was carried out in order to evaluate the posibility of zinc contamination due to the oil spill. Ricardo Prego 1* and Antonio Cobelo-García 1ġ Marine Biogeochemistry Reseach Group Instituto de Investigaciones Marinas (CSIC) C/ Eduardo Cabello 6 36208 Vigo, España. ![]() Zinc concentrations in the water column influenced by the oil spill in the vicinity of the Prestige shipwreckĬoncentraciones de zinc en la columna de agua influida por el derrame de fuel en los alrededores a la zona de naufragio del Prestige ![]()
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