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Biophysical Characteristics

Assessment of Mercury Pollution in Rivers and Streams around Artisanal Gold Mining Areas of the Birim North District of Ghana


Artisanal gold mining in local communities is on the increase. This has led to concerns about mercury pollution resulting from these mining activities. This study was conducted to assess the level of mercury pollution in rivers and streams around artisanal gold mining areas of the Birim North District of Ghana. Rivers, streams, sediments and boreholes were sampled to determine total mercury levels during the wet and dry seasons and to explore the potential impact of the mercury levels on water quality in the area. The results show that the total mercury concentrations measured upstream were significantly lower than concentrations in samples taken downstream. Also, the total mercury concentrations measured in the stream water samples in both seasons exceeded the WHO guideline limit (1.0 µg/L) for drinking water. However, one downstream total mercury concentration exceeded the guideline limit in the dry season. The total mercury concentrations in sediments upstream and downstream in both seasons exceeded the US-EPA guideline value of 0.2 mg/kg. The boreholes in the study area have total mercury concentrations exceeding the WHO guideline limit during both seasons. Total mercury concentrations in the boreholes in the wet season were lower than the dry season.

 

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Name of Author(s):
Vincent K. Nartey1, Raphael K. Klake1, Ebenezer K. Hayford2, Louis K. Doamekpor1, Richard K. Appoh3
Institutional Affiliation:
1Department of Chemistry, Faculty of Science, University of Ghana, Legon, Ghana; 2Department of Earth Science, Faculty of Science, University of Ghana, Legon, Ghana; 3Environmental Science Programme, Faculty of Science, University of Ghana, Legon, Ghana.
Type of Publication:
Journal Article
Name of Publisher or Journal:
Journal of Environmental Protection
Date of Publication:
2011
Number of Pages:
12