The minerals that are mainly extracted are gold and coltan, almost
always for exportation purposes. The growth of gold mining in the region
of the Orinoco Colombia in the last fifteen years has created a problem
of public health due to several factors such as the use of mercury in
the gold amalgamation process, ecosystem pollution and exposure of the
population of the region. The results indicate a precarious work
environment and lack of knowledge of ecological risk. The values of
blood mercury in mining ranged from 6.9 - 168 μg/L and between
individuals indirectly exposed from 17.7 to 100.8 μg/L, while in the
hair of the miners did so between 3 to 89.2 μg/L and indirectly exposed
between 2.8 to 48.7 μg/L
http://catapa.be/nl/nieuws/1594
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