Determination of persistent organic pollutants in sediment and fish of the western coast of Alexandria,Egypt |
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Authors: | Tarek O Said |
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Institution: | National Institute of Oceanography and Fisheries, Kayet Bay , Alexandria, Egypt |
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Abstract: | Persistent organic pollutants (POPs) were recorded in sediment and fish samples collected from the western coast of Alexandria. Total hydrocarbons (aliphatic+PAHs ) in sediment ranged from 683.8 to 34670.1 ng g ?1 with an average of 9286.9 ng g ?1. The sum of C16–C34 of aliphatic fractions was<4000?ng g;?1, indicating the presence of a fresh petroleum source. For all sediments, the anthracene/phenanthrene ratio was>0.1, suggesting the dominance of a pyrolytic source. Total aliphatics in different fish species ranged from 253 to 11?132 ng g;?1, while total PAHs ranged from 3862 to 35?746 ng g;?1 wet weight. Benzoa]pyrene was the most dominant PAH fraction ranged from 1902.7 to 32 905.5 with an average of 9464.5?ng g;?1 wet weight in all fish species. Concentrations of polychlorinated biphenyls (PCBs) ranged from 0.79 to 64.9?ng g;?1 with an average 12.14?ng g;?1 wet weight. The concentrations of organochlorines in fish species (Euthynnus alleferatus, Scomberomorus commerson, Sphyraena Sphyraena, Diplodus vulgaris, and Alepes djedaba) decreased following the order: PCBs>DDTs>HCHs>total cyclodienes. Concentrations of DDTs in fish tissues ranged from 4.89 to 36.37 ng g?1 with an average of 16.4?ng g;?1 wet weight. The concentrations of total HCHs ranged from 0.3 to 65.7?ng g;?1 with an average of 16.35?ng g;?1. The present study indicates: (1) fresh petroleum input where Pr/Ph>1; (2) PAHs in sediment<4000 ng g ?1; (3) BaP concentration exceeded the permissible levels in Alepes djedaba species; (4) DDTs in sediment were below the effective range low level; (5) PCBs>effective range low and
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Keywords: | POPs Sediment Fish Alexandria Egypt |
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