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Abstract
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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
Submitted: 2011 March, 03
Accepted: 2011 April, 07
Published: 2011 August, 10 |
Abstract:
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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 lagoon’s ecosystem. The contamination
status of the sediment’s 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.
Key words: Conductivity, Ghana, Lagoon, metals, sediments, water quality,
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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, . 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, (5): 487-497.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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