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Evaluation of the anthropogenic influx of metal and metalloid contaminants into the Moulay Bousselham lagoon, Morocco, using chemometric methods coupled to geographical information systems
Maanan M., Landesman C., Maanan M., Zourarah B., Fattal P. et al
Environmental Science and Pollution Research (2013) In Press - http://hal.archives-ouvertes.fr/hal-00760471
Sciences de l'Homme et Société/Etudes de l'environnement
Evaluation of the anthropogenic influx of metal and metalloid contaminants into the Moulay Bousselham lagoon, Morocco, using chemometric methods coupled to geographical information systems
Mehdi Maanan1, Catherine Landesman2, Mohamed Maanan ()1, Bendahou Zourarah3, Paul Fattal1, Mohamed Sahabi3
1 :  LETG - Géolittomer - Littoral, Environnement, Télédétection, Géomatique
http://letg.univ-nantes.fr
CNRS : UMR6554 – Université de Bretagne Occidentale (UBO) – Université de Nantes – Université de Caen Basse-Normandie – Université de Rennes II - Haute Bretagne – Université d'Angers
Faculté des Lettres BP 81227 44312 NANTES Cédex 3
France
2 :  SUBATECH - Laboratoire SUBATECH Nantes
http://www-subatech.in2p3.fr/
CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes
4, rue Alfred Kastler - 44070 Nantes Cedex 03
France
3 :  Laboratoire de Géosciences Marines et Sciences de Sol
Université d'El Jadida
Maroc
Superficial and cored sediment samples from the Moulay Bousselham lagoon and sub-watershed were analyzed for Al, Fe, Cu, Zn, Pb, Mn, Ni, Cr, As, Hg and Cd. The temporal and spatial distributions of the main contamination sources of heavy metals were identified and described using chemometric and GIS methods. Sediments from coastal lagoons near urban and agricultural areas are commonly contaminated with heavy metals and the concentrations found in surface sediments are significantly higher than those from 50-100 years ago. The concentrations of these elements decrease sharply with depth in the sediment column and the elements are preferentially enriched in the <2 µm-size fraction of the sediment. The zones of enhanced risk of heavy metals were detected by means of GIS-based geostatistical modeling. According to sediment pollution indices and statistical analysis, heavy metals (Pb, Cu, Ni, Zn, Cr and Hg) that pose a risk have become largely enriched in the lagoon sediments during the recent period of agricultural intensification.
Anglais
03/12/2012

Environmental Science and Pollution Research (Environ Sci Pollut Res Int)
Publisher Springer Verlag (Germany)
ISSN 0944-1344 (eISSN : 1614-7499)
internationale
Articles dans des revues avec comité de lecture
03/01/2013
In Press

Heavy metals – risk assessment – geographic information systems – sediment quality