Article Dans Une Revue Marine Pollution Bulletin Année : 2024

Organophosphate ester additives and microplastics in benthic compartments from the Loire estuary (French Atlantic coast)

Résumé

We report the first empirical confirmation of the co-occurrence of organophosphate esters (OPEs) additives and microplastics (MPs) in benthic compartments from the Loire estuary. Higher median concentrations of MPs (3387 items/kg dw), Σ13tri-OPEs (12.0 ng/g dw) and Σ4di-OPEs (0.7 ng/g dw) were measured in intertidal sediments with predominance of fine particles, and under higher anthropogenic pressures, with a general lack of seasonality. Contrarily, Scrobicularia plana showed up to 4-fold higher Σtri-OPE concentrations in summer (reaching 37.0 ng/g dw), and similar spatial distribution. Polyethylene predominated in both compartments. Tris (2-ethylhexyl) phosphate (TEHP), its degradation metabolite (BEHP) and tris-(2-chloro, 1-methylethyl) phosphate (TCIPP) were the most abundant OPEs in sediments, while TCIPP predominated in S. plana. The biota-sediment accumulation factors suggest bioaccumulation potential for chlorinated-OPEs, with higher exposure in summer. No significant correlations were generally found between OPEs and MPs in sediments suggesting a limited role of MPs as in-situ source of OPEs.
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hal-04517848 , version 1 (25-03-2024)

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J. Castro-Jiménez, Y. Aminot, N. Bely, C. Pollono, B.I.T. Idjaton, et al.. Organophosphate ester additives and microplastics in benthic compartments from the Loire estuary (French Atlantic coast). Marine Pollution Bulletin, 2024, 201, pp.116256. ⟨10.1016/j.marpolbul.2024.116256⟩. ⟨hal-04517848⟩
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