PCBs in wild mussels (Mytilus galloprovincialis) from the N–NW Spanish coast:Current levels and long-term trends during the period 1991–2009
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AuthorsBellas, J. (Juan); González-Quijano-Mosteiro, A. (Amelia); Vaamonde, A. (Antonio); Fumega, J. (José); Soriano-Sanz, J.A. (José Antonio); González, J.J. (Juan José)
KeywordsPolychlorinated biphenyls (PCBs)
Concentrations of polychlorinated biphenyls (PCBs) were determined in wild mussels (Mytilus galloprovincialis) from seven areas of the N–NW Spanish coast, during the period 1991–2009. The studied area is comprised of highly productive ecosystems which support important commercial fishing and shellfishing activities. The seven PCBs indicator congeners recommended by ICES (IUPAC nos. 28, 52, 101, 118, 138, 153 and 180), were analysed by gas chromatography with an electron capture detector (GC-ECD). Lowest average concentrations of PCBs were recorded in Arousa (1.04 µg kg- 1 wet weight), a low populated area with no industry; while the highest levels were found in areas near cities and/or showing a high industrial activity such as: Bilbao Ziérbena (139 µg kg -1 ww) or A Coruña (55 µg kg -1 ww). The hexachlorinated congeners CB153 and CB138 dominated the profiles in all wild mussel populations, although a geographical pattern was found in which the relative contributions of the lower ...
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