Fluordun konposatuak gure kostaldeko bizidunetan

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, perfluorooctanoic acid (PFOS), perfluorodecanoic acid (PFDA) and perfluorooctano sulphonamide (PFOSA) were the detected target analytes in all the sampling 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 liver.