Abstract
BouIsmail (BIB) and Algiers (AB) are the most important bays in Algeria, where busy shipping activities and various industry complexes introduce different pollutants including heavy metals to the aquatic environment. The main goal of this study was to assess the contamination levels of heavy metals (Cd, Cr, Cu, Fe, Hg, Mn, Pb, Zn) in surface sediments and red mullet (Mullus barbatus) of the BIB and AB and to examine the possibility of the use of their enrichment factors (EFs) to track down the sources of metals (natural processes or human activity). The geoaccumulation index (I geo) was calculated as a criterion to indicate the contamination level for each heavy metal. Moreover, geographical information systems based on spatial analysis methods (inverse distance weighting (IDW)) and statistical approaches (the principal component (PCA)) were performed to assess the spatial influences of multiple anthropogenic sources in different sampled areas. The results of both EF and I geo revealed that the study area is exposed to various anthropogenic activities. The pollution load index (PLI) values of sediment samples in the different sites of Algiers and BIB ranged from 0.2 to 3.4 illustrating highly contaminated sediments. Significant bioaccumulation of Cd, Cu, Hg, Pb, and Zn (bioaccumulation factor >100%) were observed in muscle and liver of red mullet, suggesting potential health risks through consuming this fish species.
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Acknowledgements
The authors would like to thank the captains and the crew of the oceanographic vessel N/R. “Grine Belkacem” for their help during the survey. Recognition is also extended to CNRDPA and ENSSMAL for their help during the preliminary phase of sample treatment; M. Boulahdid and M. Hamdi for their help with sampling equipment; and M. Etsouri, S. Kordali, and S. Rouidi for help in statistical analysis. The authors also thank G. Alessio for his very useful review of the first version of the paper. The author thanks the anonymous reviewers and editor for appreciative and constructive comments.
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Bachouche, S., Houma, F., Gomiero, A. et al. Distribution and Environmental Risk Assessment of Heavy Metal in Surface Sediments and Red Mullet (Mullus barbatus) from Algiers and BouIsmail Bay (Algeria). Environ Model Assess 22, 473–490 (2017). https://doi.org/10.1007/s10666-017-9550-x
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DOI: https://doi.org/10.1007/s10666-017-9550-x