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Article Dans Une Revue Marine Pollution Bulletin Année : 2022

Distribution pattern of mercury in northern Barents Sea and Eurasian Basin surface sediment

Laura M Kull
  • Fonction : Auteur
  • PersonId : 1180344
Thaise Ricardo de Freitas
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Nicolas Sanchez
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  • PersonId : 1180345
Kuria Ndungu
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  • PersonId : 1180346
Murat V Ardelan
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Résumé

Marine sediment is a significant sink for the global pollutant mercury. In a rapidly changing Arctic region, mercury (Hg) bioaccumulation in the marine ecosystem remains a prominent environmental issue. Here, we report surface sediment (0-2 cm) concentrations of Hg and other toxic elements of interest (Cr, Ni, Zn, Cu, As, Cd, Pb) in the northern Barents Sea and Eurasian Basin. We observed average Hg concentrations of 65 ± 23 ng/g with the highest concentration of 116 ng/g in the Eurasian Basin. Our calculated enrichment factors suggest low anthropogenic enrichment for mercury, chromium, nickel, and copper. Mercury and trace element geographic patterns are best explained by the origin and transportation of fine grain sediment towards the Eurasian Basin, with scavenging by both particulate organic carbon and metal oxides as significant delivery mechanisms.
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Dates et versions

hal-03834479 , version 1 (30-10-2022)

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Stephen G Kohler, Laura M Kull, Lars-Eric Heimbürger-Boavida, Thaise Ricardo de Freitas, Nicolas Sanchez, et al.. Distribution pattern of mercury in northern Barents Sea and Eurasian Basin surface sediment. Marine Pollution Bulletin, 2022, 185, ⟨10.1016/j.marpolbul.2022.114272⟩. ⟨hal-03834479⟩
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