| dc.description.abstract | Nowadays, due to the wide range of applications, the presence of per- and polyfluoroalkyl substances is increasing in the environment. Aquatic organisms are very useful bioindicators in order to assess the health of the aquatic environment. Within this objective, grey mullet (Chelon Labrosus) livers and oysters (Ostrea edulis)of the French, Basque, Spanish and Portuguese coasts were analysed. In the case of the liver, perfluorooctane sulfonic acid (PFOS), perfluorodecanoic acid (PFDA) and per-fluorooctane sulfonamide (PFOSA) were the detected target analytes in all the sam-pling points. Surprisingly high concentrations of PFOS (443-1,214 ng/g) were detected in the river of Gernika, which is placed in the Natural Reserve of Urdaibai, highlighting the effect of the wastewater treatment plant (WWTP) and/or the industry. In the case of oysters, PFOS and PFOSA were detected at levels lower than those found in live; Egun, konposatu per- eta polifluoratuek (PFAS-ek) gure eguneroko bizitzan dituzten erabilera anitzak direla eta, ingurunean gero eta nabariagoa da euren presentzia. Ur-ekosistemen egoera aztertzea helburu, organismo itsastarrak kutsaduraren adierazle ezin hobeak dira. Ildo horretan, lan honetan Frantziako, Euskal Herriko, Espainiako eta Portugaleko kostaldeetako lazunen (Chelon labrosus-en) gibelak eta ostrak (Ostrea edulis) aztertu dira. Gibelen kasuan, azido perfluorooktanosulfonikoa (PFOS), azido perfluorodekanoikoa (PFDA) eta perfluorooktanosulfonamida (PFOSA) izan dira laginak biltzeko puntu guztietan detektatutako PFAS-ak. Aipatzekoa da Urdaibaiko Erreserba Naturalean kokatuta dagoen Gernikako itsasadarrean aurkitutako PFOS-aren kontzentrazioak (443-1214 ng/g), araztegiaren edota industriaren eragina nabarmenduz. Ostren kasuan, PFOS eta PFOSA izan dira detektatutako kutsatzaileak, betiere gibelean lortutako kontzentrazioak baino baxuagoak. | |
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