| environmental assessment of mercury contamination from the rwamagasa artisanal gold mining centre, geita district, tanzania. | this study presents the results of an environmental assessment of mercury (hg) contamination in the rwamagasa artisanal gold mining area, northwest tanzania, and the potential downstream dispersion along the river malagarasi to lake tanganyika. at the time of sampling, generally low concentrations of hg (<0.05 mg/kg) occurred in most cultivated soils although higher hg (0.05-9.2 mg/kg) was recorded in urban soils and vegetable plot soils where these are impacted by hg-contaminated water and sedi ... | 2005 | 15862840 |