title: Aerosol size distribution in the Schwartzwalder uranium mine.
abstract: 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.
authors.affiliation: * 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.
authors.forename: Xianan
authors.initials: X
authors.lastname: Liu
authors.forename: John E
authors.initials: JE
authors.lastname: Doerges
authors.forename: John
authors.initials: J
authors.lastname: Volckens
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Johnson
mesh_terms: D000336:Aerosols; D006801:Humans; D008906:Mining; D016273:Occupational Exposure / Q000032:analysis; D011834:Radiation Monitoring; D011854:Radiochemistry; D011886:Radon / Q000032:analysis / Q000737:chemistry; D014501:Uranium / Q000737:chemistry*
chemical_list: D000336:Aerosols; D014501:Uranium; D011886:Radon