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Aerosol Size Distribution in the Schwartzwalder Uranium Mine

Liu, Xianan*; Doerges, John E.; Volckens, John; Johnson, Thomas E.

doi: 10.1097/HP.0000000000000000
Operational Topic

Few published data are available to describe the size distribution of aerosols within the uranium mining environment. Activity size distribution of the radon progeny attached aerosols was measured at the Schwartzwalder uranium mine (Jefferson County, Colorado, USA) using the diffusion battery method in the summer of 1970. The measurements from five of eight sites in the mine were analyzed. The average activity median diameter was approximately 55.3 nm and ranged from 34.2 to 72.7 nm. The average geometric standard deviation was approximately 2.90. The geometric standard deviation computed from the samples collected during the evening (Sites 3 and 6) was significantly smaller than from samples collected in the daytime (Sites 5, 7, and 8). The results of Site 7 showed the greatest the geometric standard deviation, a significantly higher radon concentration and a low equilibrium condition.

Analyzing size distribution of submicron aerosols for the data from Schwartzwalder uranium mine in 1970.

* Department of Environmental Health & Safety, Iowa State University, 2809 Daley Drive, Ames, IA 50010; † University Station Box 3944, University of Wyoming, Laramie, WY 82071; ‡ Department of Environmental, Radiological and Health Sciences, Colorado State University, Fort Collins, CO 80523.

The authors declare no conflicts of interest.

Xianan Liu is a health physicist in Department of Environmental Heath & Safety, Iowa State University. He has worked in Department of Environmental, Radiological & Health Sciences, Colorado State University. Xianan received his Bachelor of Science degree from Fudan University (Shanghai). He earned his Master degree in Health Physics Colorado State University and Doctoral Degree in Genetics from Clemson University. His email is

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© 2014 by the Health Physics Society