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Ibrahim, A., Bahnasawy, M., Mansy, S., EL-Fayomy, R. (1999). DISTRlBUTION OF HEAVY METALS IN THE DAMIETTA NILE ESTUARY ECOSYSTEM.. Egyptian Journal of Aquatic Biology and Fisheries, 3(4), 369-397. doi: 10.21608/ejabf.1999.3456
Abd-Alla Ibrahim; Mohammad Bahnasawy; Saham Mansy; Refaat EL-Fayomy. "DISTRlBUTION OF HEAVY METALS IN THE DAMIETTA NILE ESTUARY ECOSYSTEM.". Egyptian Journal of Aquatic Biology and Fisheries, 3, 4, 1999, 369-397. doi: 10.21608/ejabf.1999.3456
Ibrahim, A., Bahnasawy, M., Mansy, S., EL-Fayomy, R. (1999). 'DISTRlBUTION OF HEAVY METALS IN THE DAMIETTA NILE ESTUARY ECOSYSTEM.', Egyptian Journal of Aquatic Biology and Fisheries, 3(4), pp. 369-397. doi: 10.21608/ejabf.1999.3456
Ibrahim, A., Bahnasawy, M., Mansy, S., EL-Fayomy, R. DISTRlBUTION OF HEAVY METALS IN THE DAMIETTA NILE ESTUARY ECOSYSTEM.. Egyptian Journal of Aquatic Biology and Fisheries, 1999; 3(4): 369-397. doi: 10.21608/ejabf.1999.3456

DISTRlBUTION OF HEAVY METALS IN THE DAMIETTA NILE ESTUARY ECOSYSTEM.

Article 18, Volume 3, Issue 4, June 1999, Page 369-397  XML
Document Type: Original Article
DOI: 10.21608/ejabf.1999.3456
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Authors
Abd-Alla Ibrahim1; Mohammad Bahnasawy2; Saham Mansy2; Refaat EL-Fayomy3
1Zoology Dept , Faculty of Sci. Am Shams Univ.
2Zoology Dept Damietta i~aciilty of Sd , Mansoura Univ.
3Zoology Pept. Faculty of Sci, Mansoura Uinv.
Abstract
Cu, Zn, Cd and Pb concentrations have been determined in water. bottom sediment and fishes (Oreochromi. aureus and Liza ramada ) in Damietta Nile Estuary The results show that, heavy metals concentration in water was found
in the following descending order : Zn > Pb > Cu > Cd , with average concentrations between 0.03 and 0.35 for Cu 0 13 and 0.79 for Zn 0.001 and 0.005 for Cd , 0.02 and 0.51 mg/Ifor Pb. The maximum concentrations of Cu , Zn and Cd in water was found in Damietta city, while Pb concentration was the highest, in El-Borg city coast, where ship building is common. Moreover. Pb concenttdtion in most studied sites was found to exceed the international permissible limit.
Heavy metals concentration in sediment was many times higher than those of overlying water, and followed the order : Zn > Cu > Pb > Cd. Zn and Cu concentrations in sediment of most studied sites that far exceeded the international standard concentrations. Heavy metals concentration in the muscles of O.aureus and L.ramada followed the
order: Zn> Cu> Pb> Cd. The muscles and liver of L.ramada accumulated higher levels of heavy metals than those of O. aureus. However, higher concentrations were reported in the liver, while the edible muscles still have lower levels of heavy metals than the international permissible levels.
Keywords
River Nile Heavy metals; water; Sediment; lizra ramada; Oreochromis aureus
Main Subjects
Fisheries
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