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Threat of plastic ageing in marine environment. Adsorption/desorption of micropollutants

Abstract : Ageing of various plastics in marine environment was monitored after immersion of two synthetic (polyvinylchloride, PVC, and polyethylene terephthalate, PET) and one biodegradable (poly(butylene adipate co-terephtalate), PBAT) plastics for 502 days in the bay of Lorient (Brittany, France). Data analysis indicates that aged PVC rapidly releases estrogenic, compounds in seawater with a later adsorption of heavy metals; PET undergoes a low weakening of the surface whereas no estrogenic activity is detected; PBAT ages faster in marine environment than PVC. Aged PBAT exhibits heterogeneous surface with some cavities likely containing clay minerals from the chlorite group. Besides, this degraded material occasionally shows a high estrogenic activity. Overall, this study reports, for the first time, that some aged plastics, without being cytotoxic, can release estrogenic compounds in marine environment.
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Submitted on : Friday, March 15, 2019 - 3:53:13 PM
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Mikael Kedzierski, Melanie d'Almeida, Anthony Magueresse, Adelaide Le Grand, Hélène Duval, et al.. Threat of plastic ageing in marine environment. Adsorption/desorption of micropollutants. Marine Pollution Bulletin, Elsevier, 2018, 127, pp.684-694. ⟨10.1016/j.marpolbul.2017.12.059⟩. ⟨hal-02069271⟩



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