Publication:20121010105522

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Title 210Po/210Pb in Outdoor—Indoor PM-2.5, and PM-1.0 in Prague, Wintertime 2003
Subtitles
Keywords
Publication Date 2006/01/01
Exact Publication Date Unknown
Publication Number
Publication Version
Authors Jan Hovorka, Robert F. Holub, Martin Braniš, Bruce D. Honeyman
Number of Pages 8
Original URL

http://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch015

Working URL

http://911datasets.org/images/ACS_919_Urban_Aerosols_and_Their_Impacts_2006.torrent

Abstract URL

http://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch015

Preprint URL


Company or Agency
Journal
Journal Issue
Book Urban Aerosols and Their Impact: Lessons Learned from the World Trade Center Tradgedy
Book Chapter 15
Book Start Page 300
Book End Page 307
doi 10.1021/bk-2006-0919.ch015
isbn 0-8412-3916-9
Cite as
Abstract After the large aerosol releases that occurred during the WTC collapse there was a significant amount of particulates that were transported inside the nearby buildings. This type of transport is occurring in many urban areas and is particularly significant for fine aerosols in the sub micron size ranges. The210Pb net alpha activities and the mass concentrations of 24-hour and 15-min averages of PM-2.5 outdoor/indoor and PM-1.0 indoor aerosols were employed to determine penetration factors of outdoor PM-2.5 into a naturally ventilated flat on the third floor in Prague center. The PM-2.5 penetration factors were in a range of 0.42 - 0.54. The factor values determined from alpha activities were higher than the factors derived from mass concentrations. The discrepancies can be explained by size selective aerosol penetration through the building envelope, which favors aerosol particles of smaller sizes having a higher specific alpha activity than larger ones. Both the alpha activities and the 24-hour mass concentrations of PM-2.5 did not reflect personal activities indoors unlike the 15-min mass concentrations. The 15-min averages also exhibited the highest temporal variation. Nevertheless, all three variables gave similar penetration factors. Both the alpha activities and 24-hour mass concentrations have shown indoor PM-1.0 to comprise about 70% of the indoor PM-2.5. The penetration factors and ratio of indoor PM-1.0 to indoor PM- 2.5 were constant during the sampling campaign. Indoor aerosol concentrations were affected predominantly by the outdoor aerosol concentration.
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Facts about "20121010105522"RDF feed
AbstractAfter the large aerosol releases that occuAfter the large aerosol releases that occurred during the WTC collapse there was a significant amount of particulates that were transported inside the nearby buildings. This type of transport is occurring in many urban areas and is particularly significant for fine aerosols in the sub micron size ranges. The210Pb net alpha activities and the mass concentrations of 24-hour and 15-min averages of PM-2.5 outdoor/indoor and PM-1.0 indoor aerosols were employed to determine penetration factors of outdoor PM-2.5 into a naturally ventilated flat on the third floor in Prague center. The PM-2.5 penetration factors were in a range of 0.42 - 0.54. The factor values determined from alpha activities were higher than the factors derived from mass concentrations. The discrepancies can be explained by size selective aerosol penetration through the building envelope, which favors aerosol particles of smaller sizes having a higher specific alpha activity than larger ones. Both the alpha activities and the 24-hour mass concentrations of PM-2.5 did not reflect personal activities indoors unlike the 15-min mass concentrations. The 15-min averages also exhibited the highest temporal variation. Nevertheless, all three variables gave similar penetration factors. Both the alpha activities and 24-hour mass concentrations have shown indoor PM-1.0 to comprise about 70% of the indoor PM-2.5. The penetration factors and ratio of indoor PM-1.0 to indoor PM- 2.5 were constant during the sampling campaign. Indoor aerosol concentrations were affected predominantly by the outdoor aerosol concentration.ntly by the outdoor aerosol concentration. +
Abstract URLhttp://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch015 +
AuthorsJan Hovorka +, Robert F. Holub +, Martin Braniš + and Bruce D. Honeyman +
BookUrban Aerosols and Their Impact: Lessons Learned from the World Trade Center Tradgedy +
Book Chapter15 +
Book End Page307 +
Book Start Page300 +
Doi10.1021/bk-2006-0919.ch015 +
Isbn0-8412-3916-9 +
Number of Pages8 +
Original URLhttp://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch015 +
Publication Date1 January 2006 +
Title210Po/210Pb in Outdoor—Indoor PM-2.5, and PM-1.0 in Prague, Wintertime 2003 +
Working URL

http://911datasets.org/images/ACS_919_Urban_Aerosols_and_Their_Impacts_2006.torrent

+
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