Scientia Marina, Vol 74, No S1 (2010)

Trace metal concentrations in sediments from the southwest of the Iberian Peninsula


https://doi.org/10.3989/scimar.2010.74s1099

Julián Blasco
Instituto de Ciencias Marinas de Andalucía (CSIC) , Spain

Tania Gomes
CIMA, Faculty of Marine and Environmental Sciences, University of Algarve , Portugal

Tamara García-Barrera
Departamento Química y Ciencia de los Materiales, Facultad de Ciencias Experimentales, Universidad de Huelva , Spain

Araceli Rodríguez-Romero
Instituto de Ciencias Marinas de Andalucía (CSIC) , Spain

María Gonzalez-Rey
CIMA, Faculty of Marine and Environmental Sciences, University of Algarve , Portugal

Fernando Morán-Roldán
Departamento Química y Ciencia de los Materiales, Facultad de Ciencias Experimentales, Universidad de Huelva , Spain

Chiara Tromibini

Michal Miotk
CIMA, Faculty of Marine and Environmental Sciences, University of Algarve , Portugal

José Luis Gómez-Ariza
Departamento Química y Ciencia de los Materiales, Facultad de Ciencias Experimentales, Universidad de Huelva , Spain

María Joao Bebianno
CIMA, Faculty of Marine and Environmental Sciences, University of Algarve , Portugal

Abstract


Metal sediment concentrations (As, Cd, Cu, Hg, Ni, Pb and Zn) in surface sediments (0 to 5 cm) from 11 sampling stations in the southwest of the Iberian Peninsula (the Ria Formosa and the Guadiana River, the Ría de Huelva and the Bay of Cadiz) were determined in two seasonal periods (autumn 2006 and spring 2007). No seasonal metal concentration pattern was identified, as similar values were found in both periods. The highest concentrations of copper, zinc, lead and cadmium were reported in the Ria of Huelva area, and those of mercury and nickel in the Bay of Cadiz. The hazard potential index (HPiM) was determined to assess the potential risk associated with metal contamination (Cu, Cd, Pb and Zn), taking into account extractable (presumed bioavailable) fractions of these metals and site-specific sediment quality values. When the HPiM is > 1 there is risk, and according to this index Ría de Huelva is polluted whereas the Bay of Cadiz is not.

Keywords


metal; sediment; contamination; coastal zone; potential hazard; southwestern Iberian Peninsula

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