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Environmental and ecological risk of heavy metals in the marine sediment from Dakhla Bay, Morocco.

Zidane, Hakima; Maanan, Mohamed; Mouradi, Aziza; Maanan, Mehdi; El Barjy, Meryem; Zourarah, Bendahhou; Blais, Jean-François (2017). Environmental and ecological risk of heavy metals in the marine sediment from Dakhla Bay, Morocco. Environmental Science and Pollution Research , vol. 24 , nº 9. p. 7970-7981. DOI: 10.1007/s11356-017-8367-0.

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Résumé

Heavy metal assessment in Dakhla Bay (Atlantic coast) was carried out using different environmental and ecological indices. Heavy metal concentrations were measured using ICP–AES and were compared with consensus-based sediment quality guidelines. The distribution of heavy metal concentrations varies for the three groups: (i) lead distribution is dominated by its associations with copper and chromium. These elements have the same source, most probably related to anthropogenic activities. (ii) Nickel, zinc and cobalt are associated with aluminium and iron indicating their terrigenous origin (natural content), and (iii) cadmium concentration is related to upwelling currents. This paper systematically studied the distributions and pollution levels of heavy metals in sediment in the coastal areas in Dakhla Bay, which is of scientific significance, to discuss the changing rules and the affecting factors of the harmful heavy metals and can be adopted for reference to other coastal areas.

Type de document: Article
Mots-clés libres: Dakhla Bay; heavy metals; ecological risk; anthropogenic inputs; upwelling
Centre: Centre Eau Terre Environnement
Date de dépôt: 07 mai 2018 20:22
Dernière modification: 07 mai 2018 20:22
URI: http://espace.inrs.ca/id/eprint/6449

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