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Size distribution of aerosol particles produced during mining and processing uranium ore.

Abstract：

:The aerosol particle size distributions of uranium and its daughter products were studied and determined in the area of the Rožná mine, which is the last active uranium mine in the Czech Republic. A total of 13 samples were collected using cascade impactors from three sites that had the highest expected levels of dust, namely, the forefield, the end of the ore chute and an area close to workers at the crushing plant. The characteristics of most size distributions were very similar; they were moderately bimodal, with a boundary approximately 0.5 μm between the modes. The activity median aerodynamic diameter (AMAD) and geometric standard deviation (GSD) were obtained from the distributions beyond 0.39 μm, whereas the sizes of particles below 0.39 μm were not differentiated. Most AMAD and GSD values in the samples ranged between 3.5 and 10.5 μm and between 2.8 and 5.0, respectively. The geometric means of the AMADs and GSDs from all of the underground sampling sites were 4.2 μm and 4.4, respectively, and the geometric means of the AMADs and GSDs for the crushing plant samplings were 9.8 μm and 3.3, respectively. The weighted arithmetic mean of the AMADs was 4.9 μm, with a standard error of 0.7 μm, according to the numbers of workers at the workplaces. The activity proportion of the radon progeny to (226)Ra in the aerosol was 0.61.

journal_name

J Environ Radioact

journal_title

Journal of environmental radioactivity

authors

Mala H,Tomasek L,Rulik P,Beckova V,Hulka J

doi

10.1016/j.jenvrad.2016.03.011

subject

Has Abstract

pub_date

2016-06-01 00:00:00

pages

97-101

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(16)30061-3

journal_volume

157

pub_type

杂志文章

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