عرض تفاصيل البحث
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Evaluation of heavy metal pollution in Damietta Branch of Nile River, Egypt using metal indices and phyto-accumulators / | |||||
تخصص البحث : Basic Sciences | |||||
Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No. 2 - June2017 | |||||
Yasser A. El-Ameir - مؤلف رئيسي | |||||
Keywords: Heavy metals Pollution indices Hydrophytes Phytoremediation Nile River |
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Abstract The present study aimed to evaluate heavy metals pollution in Damietta-Nile River branch in Egypt using Heavy Metal Pollution Indices (HPIs). Eighteen water samples were collected from different sites along the Damietta branch in addition to samples of hydrophytes. The Damietta branch of Nile River could be divided into two different regions; the fresh Nile-water (El-Qanater El-Khayria-Farskour) and marine environment (Farskour-Ras El-Bar). The mean values of Fe, Mn, Zn and Pb showed the highest concentrations in water samples among the different sites, whereas Cu, Co, Cd and Ni maintained the lowest mean concentrations. The overall HPIs (367.35) was higher than the critical threshold pollution index, indicating considerable contamination of water in Damietta branch with metals that may attributed to excessive discharge of drainage water originated from different anthropogenic activities. According to the bioaccumulation factor (BAF), the heavy metal uptake by three macrophytic species followed the order Fe > Mn > Zn > Cu > Pb > Ni > Cd > Co. The hydrophytes Ceratophyllum demersum accumulated the highest metal content followed by Eichhornia crassipes and Myriophyllum spicatum. The resulted indicated that, the concentrations of the heavy metals were largely dependent on plant species and the sampling site. Finally, the obtained results revealed the important role of hydrophytes in biological treatment of polluted water in aquatic environments. |
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