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[9001762.] كود البحث : 9001762 - 2017/11/26
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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
  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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