Assessment of contamination by organochlorine pesticides and polychlorinated biphenyl’s from Oualidia lagoon water (Morocco) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Arabian Journal of Geosciences Année : 2020

Assessment of contamination by organochlorine pesticides and polychlorinated biphenyl’s from Oualidia lagoon water (Morocco)

Hind Lakhlalki
  • Fonction : Auteur
Maria Jayed
  • Fonction : Auteur
Samir Benbrahim
  • Fonction : Auteur
Nadia Rharbi
  • Fonction : Auteur
Ali Benhra
  • Fonction : Auteur
Brahim Moutaki
  • Fonction : Auteur

Résumé

The aim of the present study is to assess the contamination degree of Oualidia lagoon surface water by organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) through the monitoring of 13 compounds from the Stockholm Convention black list. Liquid-liquid extractions followed by gas chromatographic technique with electron capture detector (GC-ECD) are used for the analysis of these compounds. The assessment results reveal the presence of organochlorines in the lagoon with enrichment from downstream to upstream. PCBs are most abundant than OCPs with averages of 0.008 and 0.004 μg/L, respectively. p,p’ DDT is the most dominant metabolite reaching 0.023 μg/L. Among the 6 targeted PCBs, the CB180 congener is the most abundant with a concentration of 0.025 μg/L. Interactions between physico-chemical parameters of Oualidia lagoon water and the targeted compounds have been studied. Principal component analysis (PCA) results indicated that some positive correlations are observed.
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Dates et versions

hal-03120046 , version 1 (25-01-2021)

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Citer

Hind Lakhlalki, Maria Jayed, Samir Benbrahim, Nadia Rharbi, Ali Benhra, et al.. Assessment of contamination by organochlorine pesticides and polychlorinated biphenyl’s from Oualidia lagoon water (Morocco). Arabian Journal of Geosciences, 2020, 13 (16), ⟨10.1007/s12517-020-05761-5⟩. ⟨hal-03120046⟩
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