Dissolved Ions of Trace and Major Elements and in Suspended Sediments in the Nile, Egypt
Titel:
Dissolved Ions of Trace and Major Elements and in Suspended Sediments in the Nile, Egypt
Auteur:
Komy, Z. R. El-samahy, A. A.
Verschenen in:
Chemistry & ecology
Paginering:
Jaargang 11 (1995) nr. 1 pagina's 25-37
Jaar:
1995-04-01
Inhoud:
Dissolved ions and suspended participates from twelve water samples from Sohag (different localities) and Aswan (behind and below the High Dam) areas were collected along the River Nile, upper Egypt, which is at present affected seriously by pressure of population, intense industrial and agricultural activities, and atmospheric fallout. Eighteen trace and nine major ions in solution and fourteen metals in suspension were analyzed to establish whether elements are of anthropogenic or natural origin. Results of this study show that the Nile water was contaminated with high concentrations of dissolved lead, and with copper, nickel and mercury to a lesser extent, suggesting that these contaminants are generated from anthropogenic activities. the other dissolved ions in the Nile are of natural origin because their metal concentrations fall within the range of the normal background and average world dissolved values for inland waters. Results show that the usual constituents of suspended particulates in the Nile seem to be some metals (Cu and Zn) adsorbed on iron and manganese oxide/hydroxide. the results also reveal that most trace and major metal particulates increase from south to north due to activities associated with the dense population living along the Nile banks. No significant differences were observed between the chemical composition of trace and major elements taken on the east and west river Nile banks.
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