Artikkelit kirjoittajalta Eman A. Motawea
Jokiveden laatu Rosettan haarassa Niilin suistossa Egyptissä.
English title: Water quality of Rosetta branch in Nile delta, Egypt.
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Tekijät
Rosetta branch is one of the two main branches in Nile delta and El-Rahawy drain is one of this main sources, which outlet on the branch. It is subjected to many sources of pollutions from municipalities, agriculture and industry, but only little information is available on the quality of river water. The aim of this study was to analyze the river water quality in Rosetta branch at the outlet of El-Rahawy drain, Nile delta. Water samples were collected seasonally from El-Rahawy and Rosetta branch and the following physicochemical parameters were analyzed: hydrogen ion concentration (pH), total dissolved solids (TDS), electrical conductivity (EC), dissolved oxygen (DO), ammonia (NH3), total alkalinity (CO3+HCO3); biochemical oxygen demand (BOD) and chemical oxygen demand (COD). The results were compared with the water quality standards of Egypt (Law 48/1982), FAO and Canadian Water Quality standards (CWQGs). Statistical studies were carried out by calculating correlation coefficients between different parameters. The large transports of NH3, and TDS with low COD, BOD and DO values along El-Rahawy drain were seriously deteriorating the water quality in the downstream of Rosetta branch, especially during the low flow condition in winter.
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El Bouraie,
Mohamed M. El Bouraie, Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), Cairo, Egypt, email: mido.chemie@gmail.com
Sähköposti:
ei.tietoa@nn.oo
- Motawea, Sähköposti: ei.tietoa@nn.oo
- Mohamed, Sähköposti: ei.tietoa@nn.oo
- Yehia, Sähköposti: ei.tietoa@nn.oo
Raskasmetallipitoisuudet jokivedessä ja pohjasedimenteissä Niilin suistossa Egyptissä.
English title: Heavy metal concentrations in surface river water and bed sediments at Nile Delta in Egypt.
Avainsanat:
water quality;
River Nile;
Nile Delta;
Rosetta Branch;
surface water;
bed sediment;
heavy metal;
concentration;
pollution
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Tekijät
Rosetta Branch of river Nile is subjected to severe pollutants of domestic, sewage, agricultural and industrial pollution. In this study, the distribution of heavy metals (Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were measured in surface river water and the bed sediments of Rosetta Branch and the impacts of heavy metals on the water quality were monitored. The heavy metal concentrations in river water and their contents in the bed sediments were studied three times before, during and after winter period (low flow conditions) from August 2007 to April 2008. The heavy metal concentrations in the river sediments were remarkably high, but varied among sampling points, and the concentrations in water were mainly within the permissible limits. The heavy metal contents in bed sediment were highest during closure of winter period. Attention should be paid to mitigate element mobilization from sediments as their effects may become significant during seasons and years of low water flow in the river. Constant monitoring of the Nile river water quality is needed to record any alteration in the quality and mitigate outbreak of health disorders and the detrimental impacts on the aquatic ecosystem.
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El Bouraie,
Mohamed M. El Bouraie, Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), Cairo, Egypt, email: mido.chemie@gmail.com
Sähköposti:
ei.tietoa@nn.oo
- El, Sähköposti: ei.tietoa@nn.oo
- Yehia, Sähköposti: ei.tietoa@nn.oo
- Motawea, Sähköposti: ei.tietoa@nn.oo
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