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Journal of Toxicology
Volume 2012 (2012), Article ID 510876, 31 pages
http://dx.doi.org/10.1155/2012/510876
Research Article

Nanoaerosols Including Radon Decay Products in Outdoor and Indoor Air at a Suburban Site

Department of Environmental Sciences, Radon Center, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia

Received 26 July 2011; Revised 15 October 2011; Accepted 18 October 2011

Academic Editor: Laura Canesi

Copyright © 2012 Mateja Smerajec and Janja Vaupotič. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanoaerosols have been monitored inside a kitchen and in the courtyard of a suburban farmhouse. Total number concentration and number size distribution (5–1000 nm) of general aerosol particles, as measured with a Grimm Aerosol SMPS+C 5.400 instrument outdoors, were mainly influenced by solar radiation and use of farming equipment, while, indoors, they were drastically changed by human activity in the kitchen. In contrast, activity concentrations of the short-lived radon decay products 218Po, 214Pb, and 214Bi, both those attached to aerosol particles and those not attached, measured with a Sarad EQF3020-2 device, did not appear to be dependent on these activities, except on opening and closing of the kitchen window. Neither did a large increase in concentration of aerosol particles smaller than 10 or 20 nm, with which the unattached radon products are associated, augment the fraction of the unattached decay products significantly.