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Proceedings of the International Academy of Ecology and Environmental Sciences, 2012, 2(2): 128-135
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Article

Hydrogeochemistry of groundwater in parts of the Ayensu Basin of Ghana

Nafisatu Zakaria 1, Tetteh T. Akiti2, Shiloh Osae1, Adomako Dickson1, Samuel Y. Ganyaglo1, John E.K. Hanson1, Godfred Ayanu1
1Nuclear Chemistry and Environmental Research Center, Ghana Atomic Energy Commission, Legon-Accra, Ghana
2Graduate School of Nuclear and Allied Sciences, University of Ghana, Legon-Accra, Ghana

Received 28 October 2011;Accepted 2 December 2011;Published online 5 June 2012
IAEES

Abstract
Twenty five groundwater samples were collected from parts of the Ayensu Basin in the Central Region of Ghana and were analysed for their physicochemical characteristics. The physicochemical parameters; pH, Conductivity, total dissolved solids (TDS), calcium (Ca2+), magnesium (Mg2+), sodium (Na+), potassium (K+), bicarbonate (HCO32-), chloride (Cl-), sulphate (SO42-) and nitrate (NO3-) were analysed to know the present groundwater quality as well as the possible source of ions in the groundwater. The groundwater in the area is fresh and the dominant water types in the study area are Na-Cl and Na-HCO3-Cl: the occurrence of these facies is identified to be probably due to the dissolution of soluble salts in the soil horizon and aerosol spray. The occurrence of Na+, Cl-, K+, Ca2+, Mg2+ and SO42- in the groundwaters was also found to be probably caused by sea aerosol spray and decay of organic matter.

Keywords groundwater;Ayensu Basin;salinity;major ions.


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