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

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 chro...

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Bibliographic Details
Published in:Arabian journal of geosciences 2020-08, Vol.13 (16), Article 821
Main Authors: Lakhlalki, Hind, Jayed, Maria, Benbrahim, Samir, Rharbi, Nadia, Benhra, Ali, Moutaki, Brahim, Maanan, Mohamed
Format: Article
Language:English
Subjects:
Beta decay
Biphenyl
Chlorine compounds
Chromatography
Congeners
Contamination
DDT
Earth and Environmental Science
Earth science
Earth Sciences
Electron capture
Electron capture detectors
Environmental studies
Gas chromatography
Humanities and Social Sciences
Lagoons
Metabolites
Organic compounds
Organochlorine compounds
Organochlorine pesticides
Original Paper
PCB
Pesticides
Polychlorinated biphenyls
Principal components analysis
Surface water
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Summary: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.
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-020-05761-5