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Chemical composition of rainwater over a mining area in Ghana
International Journal of Environmental Research. 2011; 5 (4): 847-854
in English | IMEMR | ID: emr-122637
ABSTRACT
A comprehensive study on the chemical composition of rainwater was carried out in Obuasi, a gold mining town in Ghana. Rainwater samples were analyzed for major ions [Ca[2+],Mg[2+], K[+], Na[+], NH[4+], Cr, NO[3-] and SO[4][2-] and trace metals [Fe, Al, Zn, Pb, Cr, and Cd]. The rainwater was typically acidic with a mean pH of 4.76 +/- 0.47, which ranged from 4.0 to 5.6. The low pH found in the water suggests that the concentration of the alkaline particles in the rainwater were not high enough to neutralize acidic species present. SO[4][2"] and CH were the main anions, while Ca[2+] and K[+] were the main cations. Concentrations of trace metals in this study were compared with those of other studies conducted at different sites in the world. The result of this study generally suggests that rainwater chemistry in the area is strongly influenced by local anthropogenic sources [mining]. The pollutants in rainwater samples were mainly derived from mining activities. Concentrations of Pb in all the samples were above the WHO permissible limit of 0.01 mg/L for drinking water
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Index: IMEMR (Eastern Mediterranean) Main subject: Trace Elements / Hydrogen-Ion Concentration / Mining Language: English Journal: Int. J. Environ. Res. Year: 2011

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Index: IMEMR (Eastern Mediterranean) Main subject: Trace Elements / Hydrogen-Ion Concentration / Mining Language: English Journal: Int. J. Environ. Res. Year: 2011