Sedimentary records of anthropogenic contribution to heavy metal content in Oum Er Bia estuary (Morocco)
In: Hyper Article en Ligne - Sciences de l'Homme et de la Société, 2008
academicJournal
Zugriff:
International audience Levels of heavy metals (Cd, Hg, Cr, Cu, Fe, Mn, Ni, Pb and Zn), organic carbon content and textural characteristics in the superficial and cored sediments of Oum Er Bia estuary have been studied. The anthropogenic fluxes of heavy metals were determined in two sediment cores collected in the estuary, facing urban sewages. A dated estuarine core from the inter-tidal area was assessed using 210Pb and 137Cs data. These data indicate that the mean sedimentation rates are 0.38–68 cm year-1. The analytical results and the radio-dating of sediment cores show extremely high concentrations of Zn, Pb and Cu in the sediments that can be ascribed mostly to the discharge of the liquid effluent from the sewage since the late 1960s, decreasing towards the present day. The pollution intensity of the estuary is determined by the enrichment factors, which show that the Oum Er Bia estuary is moderately polluted to polluted.
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Sedimentary records of anthropogenic contribution to heavy metal content in Oum Er Bia estuary (Morocco)
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Autor/in / Beteiligte Person: | Zourarah, B. ; Maanan, M. ; Robin, Marc ; Carruesco, C. ; Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) ; Université de Caen Normandie (UNICAEN) ; Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE) ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2) ; Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) ; Université de Nantes (UN)-Université de Nantes (UN) |
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Zeitschrift: | Hyper Article en Ligne - Sciences de l'Homme et de la Société, 2008 |
Veröffentlichung: | HAL CCSD ; Springer Verlag, 2008 |
Medientyp: | academicJournal |
DOI: | 10.1007/s10311-008-0138-1 |
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