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Obiri S Dodoo DK Okai-Sam F Essumang DK 《Environmental monitoring and assessment》2006,118(1-3):51-63
Cyanide is a very toxic chemical that is used to extract gold from its ores. Wastewaters from gold mining companies such as
Bogoso Gold Limited (BGL) contain cyanide and other potentially toxic chemicals that have adverse effects on human beings
and aquatic organisms. This study was conducted to evaluate the human health risk assessment from exposure to free cyanide
via oral and dermal contact of surface/underground water by resident adults within the concession of Bogoso Gold Limited.
The chronic non-cancer health risk from exposure to cyanide in River Bogo Upstream is 230 and 43 (by Central Tendency Exposure
(CTE) parameters respectively). This means that approximately 230 and 43 resident adults are likely to suffer diseases related
to cyanide intoxication via oral and dermal contact respectively. For chronic exposure to River Bogo Downstream by resident
adults, the non-cancer health risks are: 0.031 and 0.57 via oral and dermal contact for CTE parameters respectively, which
also means that, the non-cancer health risks associated with cyanide intoxication is negligible as the hazard index is less
than 1.0 via oral and dermal contacts respectively. The results showed that health risk for acute exposure to cyanide by the
resident adults is very high. Hence the residents attribute most of the unexplained deaths in the communities to accidental
ingestion and dermal contact of cyanide water. 相似文献
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Obiri S 《Environmental monitoring and assessment》2007,130(1-3):455-463
Concentrations of heavy metals in the borehole at Dumasi in the Wassa West District of the Republic of Ghana have been measured
in this study. The concentrations of the following metals in the ground water from Dumasi borehole are: Iron (Fe) – 7.52 ppm,
Manganese (Mn) – 1.11 ppm, Arsenic (As) – 4.52 ppm, Chromium (Cr) – 0.026 ppm, Cobalt (Co) – 0.01 ppm, Zinc (Zn) – 0.007 ppm,
Cadmium (Cd) – 0.002 ppm and Lead (Pb) – 0.005 ppm. The results of the study show that resident adults and children who use
water from the boreholes are at serious risk from exposure to health hazards associated with exposure to the above metals
in the boreholes in Dumasi. If the results of this study are applied to other mining communities, which lie on the Birimian
and Tarkwaian rock system, then the residents are at serious risk from exposure to toxic metals from drinking water from the
boreholes dug for them by mining companies operating in their communities. 相似文献
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