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- Title
Particulate reactive oxygen species on total suspended particles - measurements in residences in Austin, Texas.
- Authors
Khurshid, S. S.; Siegel, J. A.; Kinney, K. A.
- Abstract
The biologically relevant characteristics of particulate matter ( PM) in homes are important to assessing human health. The concentration of particulate reactive oxygen species ( ROS) was assessed in eight homes and was found to be lower inside (mean ± s.e. = 1.59 ± 0.33 nmol/m3) than outside (2.35 ± 0.57 nmol/m3). Indoor particulate ROS concentrations were substantial and a major fraction of indoor particulate ROS existed on PM2.5 (58 ± 10%), which is important from a health perspective as PM2.5 can carry ROS deep into the lungs. No obvious relationships were evident between selected building characteristics and indoor particulate ROS concentrations, but this observation would need to be verified by larger, controlled studies. Controlled experiments conducted at a test house suggest that indoor ozone and terpene concentrations substantially influence indoor particulate ROS concentrations when outdoor ozone concentrations are low, but have a weaker influence on indoor particulate ROS concentrations when outdoor ozone concentrations are high. The combination of substantial indoor concentrations and the time spent indoors suggest that further work is warranted to assess the key parameters that drive indoor particulate ROS concentrations.
- Subjects
AUSTIN (Tex.); PARTICULATE matter; REACTIVE oxygen species; HOUSING &; the environment; AIR pollution measurement; LUNG physiology
- Publication
Indoor Air, 2016, Vol 26, Issue 6, p953
- ISSN
0905-6947
- Publication type
Article
- DOI
10.1111/ina.12269