Skip to Main content Skip to Navigation
Journal articles

Priority and emerging micropollutants distribution from coastal to continental slope sediments: A case study of Capbreton Submarine Canyon (North Atlantic Ocean)

Abstract : Incising continental margins, submarine canyons are key issue for understanding shelf/deep sea exchange of particulate pollutant, impact on marine ecosystem and global geochemical cycling. The occurrence and distribution of 100 priority and emerging micropollutants were investigated in sediments within the first 25 km of the Capbreton submarine area. The most predominant compounds were polycyclic aromatic hydrocarbons (PAHs), trace metals and metalloid (TMs) (e.g. mercury, lead and arsenic), synthetical musks (e.g. musk ketone, galaxolide), UV filters (e.g. octocrylene and 2-ethylhexyl 4-methoxycinnamate, EHMC) as well as some pharmaceuticals (e.g. azithromycin, acetaminophen). Highest concentrations were measured in submarine canyon sediments, distant from the coast and were correlated with both organic carbon and fine fraction contents, where PAHs, EHMC and musk ketone concentrations up to 7116, 32 and 7 ng g−1 dry weight, respectively. Those results likely demonstrate, that atmospheric inputs of pyrogenic PAHs, and both trapping and transporting of polluted particles along the continuum shore/deep sea by the Capbreton Canyon, might lead to an accumulation of anthropogenic micropollutants. The ecological risk assessment indicates that priority pollutants raise a potentially high risk for benthic organisms (e.g. PAHs, TMs). This might raised a specific concern about how the human can impact this ecosystem.
Complete list of metadatas

https://hal-univ-pau.archives-ouvertes.fr/hal-02430453
Contributor : Sylvie Blanc <>
Submitted on : Tuesday, January 7, 2020 - 12:26:23 PM
Last modification on : Wednesday, March 4, 2020 - 1:48:13 AM

Identifiers

Collections

Citation

Alyssa Azaroff, Carole Miossec, Laurent Lanceleur, Rémy Guyoneaud, Mathilde Monperrus. Priority and emerging micropollutants distribution from coastal to continental slope sediments: A case study of Capbreton Submarine Canyon (North Atlantic Ocean). Science of the Total Environment, Elsevier, 2020, 703, pp.135057. ⟨10.1016/j.scitotenv.2019.135057⟩. ⟨hal-02430453⟩

Share

Metrics

Record views

53