Title of article :
Exposure of workers in mineral processing industries in Brazil
Author/Authors :
J. L. Lipsztein، نويسنده , , K. M. Dias da Cunha، نويسنده , , A. M. G. Azeredo، نويسنده , , L. Juli?o، نويسنده , , M. Santos، نويسنده , , D. R. Melo، نويسنده , , F. F. L. Sim?es Filho، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Pages :
11
From page :
189
To page :
199
Abstract :
The mining, milling and processing of uranium and thorium bearing minerals may result in radiation doses to workers. A preliminary survey pilot program, that included six mines in Brazil (two coal mines, one niobium mine, one nickel mine, one gold mine and one phosphate mine), was launched in order to determine the need to control the radioactive exposure of the mine-workers. Our survey consisted of the collection and analysis of urine samples, complemented by feces and air samples. The concentrations of uranium, thorium and polonium were measured in these samples and compared to background data from family members of the workers living in the same dwelling and from residents from the general population of Rio de Janeiro. The results from the coal mines indicated that the inhalation of radon progeny may be a source of occupational exposure. The workers from the nickel, gold and phosphate mines that were visited do not require a program to control internal radiological doses. The niobium mine results showed that in some areas of the industry exposure to thorium and uranium might occur.
Keywords :
thorium , Polonium , Enhanced natural radiation exposure , Mining workers internal exposure , uranium
Journal title :
Journal of Environmental Radioactivity
Serial Year :
2001
Journal title :
Journal of Environmental Radioactivity
Record number :
705937
Link To Document :
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