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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Acumulación de contaminantes en los sedimentos superficiales del estuario del Nervión (golfo de Bizkaia)

The pollutants accumulation in the surface sediments from the Nervion estuary (Bay of Biscay)

Océanographie du Golfe de Gasgogne (Biarritz, 4-6 avril 2000)

Auteur(s) et Affiliation(s)

SOLAUN, Oihana
AZTI, Instituto Tecnológico Alimentario y Pesquero, Dpto de Oceanografía y Medio Ambiente Marino, Avda Satrústegui 8, 20008 San Sebastián, Espagne
BELZUNCE, Maria Jesus
AZTI, Instituto Tecnológico Alimentario y Pesquero, Dpto de Oceanografía y Medio Ambiente Marino, Avda Satrústegui 8, 20008 San Sebastián, Espagne
FRANCO, Javier
AZTI, Instituto Tecnológico Alimentario y Pesquero, Dpto de Oceanografía y Medio Ambiente Marino, Avda Satrústegui 8, 20008 San Sebastián, Espagne
VALENCIA, Victoriano
AZTI, Instituto Tecnológico Alimentario y Pesquero, Dpto de Oceanografía y Medio Ambiente Marino, Avda Satrústegui 8, 20008 San Sebastián, Espagne
BORJA, Angel
AZTI, Instituto Tecnológico Alimentario y Pesquero, Dpto de Oceanografía y Medio Ambiente Marino, Avda Satrústegui 8, 20008 San Sebastián, Espagne


Description :
The results obtained in a sampling survey of surface sediments covering the entire estuary of the Nervión river are presented in this work. Samples for grain size distribution, redox potential, organic matter, carbon and nitrogen content were taken in 70 stations; in 25 selected locations, also heavy metals (As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn) and organic compounds (PCBs, PAHs, pesticides) analyses have been made. The highest pollutant levels have been observed in the middle reaches of the estuary, being specially high for As, Hg, Cd and Cu. A clear positive relation between the fine texture of the sediments, the anoxic properties, the content of organic matter and the concentration of contaminants has been found. According with Spanish recommendations for sediment management, the sediments of the Nervión estuary were mainly classified into categories II and IIIa.


Type de document :
Congrès

Source :
Colloque international d'océanographie du Golfe de Gascogne, 7, Biarritz, France, 2000-04-04, Actes de colloques - IFREMER, issn : 0761-3962, 2001, vol. 31, p. 313-318, Collation : Illustration ; Tableau, Références bibliographiques : 3 ref.

Date :
2001

Identifiants :
isbn : 2-84433-054-1

Editeur :
Pays édition : France, Plouzané, Institut français de recherche pour l'exploitation de la mer

Langue :
EspagnolAnglais
Droits :
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