Evaluation of the anthropogenic influx of metal and metalloid contaminants into the Moulay Bousselham lagoon, Morocco, using chemometric methods coupled to geographical information systems

Abstract : 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.
Type de document :
Article dans une revue
Environmental Science and Pollution Research, Springer Verlag, 2013, pp.In Press. <10.1007/s11356-012-1399-6>


https://hal.archives-ouvertes.fr/hal-00760471
Contributeur : Mohamed Maanan <>
Soumis le : mardi 4 décembre 2012 - 08:20:21
Dernière modification le : lundi 12 octobre 2015 - 13:41:14

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Mehdi Maanan, Catherine Landesman, Mohamed Maanan, Bendahou Zourarah, Paul Fattal, et al.. Evaluation of the anthropogenic influx of metal and metalloid contaminants into the Moulay Bousselham lagoon, Morocco, using chemometric methods coupled to geographical information systems. Environmental Science and Pollution Research, Springer Verlag, 2013, pp.In Press. <10.1007/s11356-012-1399-6>. <hal-00760471>

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