- Occurrence of perfluoroalkyl substances in the Bay of Marseille (NW Mediterranean Sea) and the Rhône River
- Producteur(s)
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- Type de producteur
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- Nature de l'étude
- 2019
- Thèmes
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- Mots-clés
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- Objectif
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The objectives of this study were: (1) to investigate the waterborne occurrence of PFOS and three other PFAS (perfluorohexanoic acid - PFHxA, perfluorohexane sulfonic acid - PFHxS and perfluorooctanoic acid - PFOA) in the Rhône River and Marseille Bay; (2) to perform a local risk assessment by comparing the measured concentrations with the annual average EQS values for water and; (3) to investigate the PFOS inputs into the Gulf of Lions and the Bay of Marseille associated to freshwater intrusion from the Rhône River by using a modelling approach.
- Conclusion
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Perfluorooctane sulfonate (PFOS) was detected in all samples and exceeded the European Environmental Quality Standard (EQS) values in over 80% of the cases.
The most contaminated samples were from the Rhône River (up to 200 ng L-1 ∑4 PFAS), as well as those collected near a wastewater treatment plant outlet in Marseille Bay (up to 9 ng L−1 ∑4 PFAS).
While PFOS was the predominant PFAS in Marseille Bay, remarkably high concentrations of perfluorohexanoic acid (PFHxA) were measured in the Rhône River (8–193 ng L−1 ).
The relative abundances of individual compounds differed thus significantly between the Rhône River and Marseille Bay, indicating different sources.
A simulation made with the MARS3D model showed that PFOS inputs from the Rhône River can enter Marseille Bay at levels > EQS.
Ce projet a été financé par l’ARS PACA et la DREAL PACA labellisées PRSE pour la partie Fos-sur-Mer et par l’OHM BMP pour la partie Bassin Minier de Provence.
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