NIVEAUX DE CONTAMINATION PAR LES METAUX LOURDSDU COMPLEXE LACUSTRE « TONGA, OUBEIRA, ELMELLAH» DU PARC NATIONAL D’EL-KALA

Type : Mémoire de magister
Auteur(s) :  Amel Bendjama
Directeurs du mémoire/thèse :  -
Année :  2007
Domaine : Chimie
Etablissement :  Université Badji Mokhtar de Annaba
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  contamination, heavy metals, sediment, water, anguilla anguilla, Ruditapes decussatus, Anodonta sp, wetland areas, Lake Tonga, Lake Oubeira, Mellah Lagoon.

Résumé :

The aim of our study concerns the evaluation of levels of contamination by 9 heavymetals (Fe, Cu, Zn, Mn, Ni, Cr, Pb, Cd, Hg) in water, sediment and aquatic organisms within3 wetland areas Tonga, Oubeira and Mellah in the National Park of El Kala.Lake El Mellah: water, sediment and bivalve “Ruditapes decussatus”.Lake Tonga: water, sediment and eel “Anguilla anguilla”.Lake Oubeira: water, sediment and mussel watch” Anodonta sp”.In each area, two sampling station were fixed. During the year 2006, 154 samplingswere carried out.Statistical analysis (ANOVA and PPDS) of concentration of these 9 heavy metals atthe level of water and sediment showed significant variation in time and space.In Lake Oubeira, waters are polluted by Fe, Cu, Mn, Ni, Pb, Cr, Cd, Hg. In LakeMellah, levels of pollution by Fe, Mn, Ni, Cr, Pd, Cd, and Hg are higher than Europeanstandards. In Lake Tonga, 6 heavy metals (Fe, Mn, Ni, Cr, Pb, Cd) show high levels.Measurements of levels of heavy metals in sediment show higher values of :• Fe, Ni, Cr in Mellah,• Fe in Oubeira• Fe, Pb, Cd in TongaIn aquatic organisms, levels of heavy metals in Anguilla anguilla from Lake Tonga andRuditapes decussatus from Lake Mellah are very low, whereas very high in Anodonta Sp.from Lake Oubeira.