title: Trace metals in algae and sediments from the North-Eastern Tunisian lagoons.
abstract: The mean concentrations of copper, zinc, plomb, nickel and chrome were determined in algae and sediments collected from three aquatic areas of the Tunisian North-East (Sebkhet Sijoumi and Radès and Bizerte lagoon). The recorded metal levels, ranging (in μg g⁻¹) from 1.58 to 68.56 for macroalgae and from 8.70 to 234.40 for sediment samples, were low in most of the sampling locations and similar to those of sites qualified as «slightly polluted». However, certain locations showed significant differences with the remaining sites indicating some degree of contamination (ANOVA, p < 0.001). These locations were found in Sebkhet Radès and Bizerte lagoon for copper, zinc, nickel and chrome metals and in Sebkhet Sijoumi for plomb in algae. The study of the correlation between metal contents in algae and sediments showed highly significant positive values for zinc and plomb (p < 0.01). A significant correlation was also noticed for Cr (p < 0.05). However, there was no clear relationship between copper and nickel levels in both matrices.
authors.affiliation: Laboratoire de Chimie Analytique et Electrochimie, Département de Chimie, Faculté des Sciences de Tunis, 2092 Campus Universitaire, 18 Rue Ibrahim Ibn El Aghleb, El Menzah 4, 1004 Tunis, Tunisie. mfh22002@yahoo.fr
authors.forename: M El Ati
authors.initials: Mel A
authors.lastname: Hellal
authors.forename: Fayçal
authors.initials: F
authors.lastname: Hellal
authors.forename: Z
authors.initials: Z
authors.lastname: El Khemissi
authors.forename: R
authors.initials: R
authors.lastname: Jebali
authors.forename: M
authors.initials: M
authors.lastname: Dachraoui
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D008670:Metals / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D044445:Ulva / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical