Related Experiment Video
Updated: May 4, 2026

Experimental Protocol to Investigate Particle Aerosolization of a Product Under Abrasion and Under Environmental Weathering
Published on: September 16, 2016
Aerosol size distribution in the Schwartzwalder uranium mine
Xianan Liu1, John E Doerges, John Volckens
1* 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.
This study measured radon progeny aerosol size distribution in a uranium mine. The average activity median diameter was 55.3 nm, with variations observed between day and evening sampling.
Area of Science:
- Environmental Science
- Occupational Health
- Aerosol Science
Background:
- Limited data exist on aerosol size distribution in uranium mining environments.
- Radon progeny aerosols are a significant occupational exposure concern in mines.
Purpose of the Study:
- To characterize the activity size distribution of radon progeny attached aerosols.
- To analyze aerosol size variations within the Schwartzwalder uranium mine.
Main Methods:
- Utilized the diffusion battery method for aerosol size distribution measurements.
- Collected samples at multiple sites within the uranium mine.
- Analyzed data from five of eight sampled locations.
Main Results:
- The average activity median diameter of aerosols was approximately 55.3 nm (range: 34.2–72.7 nm).
- The average geometric standard deviation was approximately 2.90.
- Smaller geometric standard deviations were observed in evening samples compared to daytime samples.
Conclusions:
- Aerosol size distribution in uranium mines can vary significantly.
- Time of day influences radon progeny aerosol characteristics.
- Site 7 exhibited high geometric standard deviation, elevated radon concentration, and low equilibrium, indicating unique conditions.
Related Concept Videos
Atomic Absorption Spectroscopy: Atomization Methods
Atomic Emission Spectroscopy: Overview
Microbial Bioremediation of Uranium

