Article (Scientific journals)
Potentially Toxic Elements Contamination and Ecological Risk Assessment in Surface Sediments of Moulouya Estuary (Northeastern, Morocco)
Basraoui, Nour-elhouda; Ben-tahar, Rihab; Deliège, Jean-François et al.
2024In Scientific African, p. 02295
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Keywords :
heavy metals; PTE; bioavailability; contamination indeces; ecological risk; moulouya
Abstract :
[en] Potentially toxic elements (PTEs) in aquatic ecosystems are a major environmental concern posing serious risks to aquatic life and human health. Understanding their distribution, sources, and effects is crucial for effective environmental management and the protection of biodiversity and natural resources. This study assessed the variability, bioavailability, contamination degree, and ecological risks of PTEs in surface sediments of the Moulouya Estuary. The levels of PTEs were determined using an inductively coupled plasma-optical emission spectrometry (ICP-OES). The mean concentrations of PTEs can be classified in the following order: Zn > Cr > As > Pb >Cu > Cd. The highest values were found in sites (S2, S4, and S5) that receive metals from anthropogenic activities. The mineralogical study showed that the sediment studied is dominated by Ca, which influences the PTEs mobility and makes them bioavailable in the aquatic environment, which means aquatic organisms can easily assimilate them. The PTEs contamination degree was determined by several pollution indices (CF, CD, PLI, EF, Igeo), which indicate that surface sediment shows low to moderate contamination levels. However, the Potential Ecological Risk indicates a moderate to considerable risk in the study area. The multivariate analysis indicates that As, Zn, Cr, Pb, and Cu are derived from anthropogenic activities (urban wastewater, fertilizers, and fishing boats), while Cd could have mixed sources. The results highlight suggest that human activities pose an ecotoxicological risk in the Moulouya Estuary. To minimize these risks and protect the aquatic ecosystem and human health, periodic monitoring and management strategies should be continued. These measures will enable early detection of changes in PTE levels and the
Research Center/Unit :
Aquapôle - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
PeGIRE Laboratory
Disciplines :
Environmental sciences & ecology
Author, co-author :
Basraoui, Nour-elhouda
Ben-tahar, Rihab
Deliège, Jean-François  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Aquapôle
El Guerrouj, Bouchra
Chafi, Abdelhafid
Language :
English
Title :
Potentially Toxic Elements Contamination and Ecological Risk Assessment in Surface Sediments of Moulouya Estuary (Northeastern, Morocco)
Alternative titles :
[fr] Contamination potentielle en éléments toxiques et évaluation du risque écologique dans les sédimennts des eaux de surface de l'estuaire de la Moulouya (nord-est du Maroc)
Publication date :
June 2024
Journal title :
Scientific African
eISSN :
2468-2276
Publisher :
Elsevier BV
Pages :
e02295
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
6. Clean water and sanitation
14. Life below water
Available on ORBi :
since 25 June 2024

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