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2011 (Vol. 3, Issue: 5)
Article Information:

Water Quality and Level of Some Heavy Metals in Water and Sediments of Kpeshie Lagoon, La-Accra, Ghana

M.A. Addo, G.M. Okley, H.A. Affum, S. Acquah, J.K. Gbadago, J.K. Senu and B.O. Botwe
Corresponding Author:  Hannah Asamaoh Affum 

Key words:  Conductivity, Ghana, Lagoon, metals, sediments, water quality,
Vol. 3 , (5): 487-497
Submitted Accepted Published
2011 March, 03 2011 April, 07 2011 August, 10
Abstract:

The water quality and levels of some trace metals in water and sediments of the Kpeshie Lagoon located in Accra, Ghana were studied in March, 2009. Water and sediment samples of the lagoon were analyzed for various parameters. The water quality parameters included pH, temperature, conductivity, Total Dissolved Solids (TDS), salinity, Dissolved Oxygen (DO), and nutrients. The results showed that conductivity (19370- 28500 μS/cm), total dissolved solids (9750-14180 mg/L), chlorine (5725.2-8277.6 mg/L) and total alkalinity (800-2000 mg/L) were at an intermediate state between fresh and saline waters. However, the studied nutrients contents of the water were at levels within regulatory limits for natural waters. The heavy metals in the sediment especially nickel (71.8-1568 μg/g), lead (0.5-27.10 μg/g) and chromium (190-26328 μg/g) was adjudged a potential health risk to humans and the aquatic life of the lagoonís ecosystem. The contamination status of the sedimentís heavy metals was confirmed on the basis of Enrichment Factor (EF) and geoaccumulation index (Igeo). The EF and Igeo results supported the fact that the sediments were highly enriched with Ni, and Cr and to a lesser extent Pb. The sediment was found to be practically unpolluted with Zn and that the source of contamination was natural.
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  Cite this Reference:
M.A. Addo, G.M. Okley, H.A. Affum, S. Acquah, J.K. Gbadago, J.K. Senu and B.O. Botwe, 2011. Water Quality and Level of Some Heavy Metals in Water and Sediments of Kpeshie Lagoon, La-Accra, Ghana.  Research Journal of Environmental and Earth Sciences, 3(5): 487-497.
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