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Title

Sources and distribution of polycyclic aromatic hydrocarbons in sediments from the Spanish northern continental shelf. Assessment of spatial and temporal trends

AuthorsViñas, Lucía; Franco, María Ángeles; Soriano, J. A.; González, Juan José; Pon, Jordi
KeywordsSpanish Atlantic coast
Sediments
Polycyclic aromatic hydrocarbons
Sediment quality guidelines
Field variance
Issue Date2010
PublisherElsevier
CitationEnvironmental Pollution
AbstractThe distribution of polycyclic aromatic hydrocarbons was determined in surface sediments collected at 36 stations along the Spanish Northern continental shelf in March and September 2003, and February 2005. Concentrations of PAHs (Σ13 parent components) were in the range of 22–47528 μg/kg dw, the highest values corresponding to coastal urban-industrial hotspots and decreasing offshore. Sediment quality guidelines (SQGs) showed that concentrations of total PAHs were below the threshold effect level (TEC) in 27 stations (81%) and above in 7, two of which (Gijon and Bilbao) were above the probable effect concentration (PEC). The detailed study of diagnostic ratios suggested a rather uniform mixture of petrogenic and pyrolytic PAH sources along the continental shelf, with a slight decrease of the latter moving westwards and offshore. In order to assess the incidence of sediment sampling on the variability of the results, selected stations were also monitored in February and September 2004 and September 2005. The average field variance of the values obtained for each station was 31% that decreased to 23% when the values were normalized to TOC.
Publisher version (URL)http://dx.doi.org/10.1016/j.envpol.2009.12.023
URIhttp://hdl.handle.net/10261/44398
DOI10.1016/j.envpol.2009.12.023
ISSN0269-7491
E-ISSN1873-6424
Appears in Collections:(IDAEA) Artículos
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