title: Assessment of metal status in drainage canal water and their bioaccumulation in Oreochromis niloticus fish in relation to human health.
abstract: The purpose of this study was to assess metal concentrations (Al, Cd, Pb, Hg and Ni) in Sabal drainage canal (Al-Menoufiya Province, River Nile Delta, Egypt) water as well as their accumulation in some selected organs (skin, muscles and kidneys) of Oreochromis niloticus fish to evaluate their hazard levels in relation to the maximum residual limits for human consumption. Drainage canal water was found to be heavily polluted with metals which far exceeded the permissible limits. It was found that metals accumulated in organs of O. niloticus in concentrations higher than those of canal water. Kidneys of O. niloticus contained the highest concentrations of the detected metals, while skin appeared to be the least preferred site for the bioaccumulation of metals as the lowest metals concentrations were detected in this tissue. The present study shows that fish organs contained high levels of metals exceeding the permissible limits values. Metals in muscle of fish were higher than the maximum permissible concentrations for human consumption. Thus, consuming fish caught from drainage canals is harmful to the consumers.
authors.affiliation: Department of Hydrobiology, National Research Centre, El-Bohooth Street (formerly El -Tahrir Street), Dokki 12622, Gizza, Egypt. mmauthman@yahoo.com
authors.forename: Mohammad M N
authors.initials: MM
authors.lastname: Authman
authors.forename: Hossam H
authors.initials: HH
authors.lastname: Abbas
authors.forename: Wafaa T
authors.initials: WT
authors.lastname: Abbas
mesh_terms: D000818:Animals; D023681:Cichlids / Q000378:metabolism*; D004032:Diet / Q000706:statistics & numerical data; D004534:Egypt; D004784:Environmental Monitoring; D005506:Food Contamination / Q000706:statistics & numerical data; D006304:Health Status; D006801:Humans; D008670:Metals / Q000032:analysis* / Q000378:metabolism; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical