The transformation of outdoor ammonium nitrate aerosols in theindoor environment

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Recent studies associate particulate air pollution with adverse health effects; however, the exposure to indoor particles of outdoor origin is not well characterized, particularly for individual chemical species. In response to this, a field study in an unoccupied, single-story residence in Clovis, California has been conducted. Real-time particle monitors were used both outdoors and indoors to quantify PM2.5 nitrate, sulfate, and carbon. The results show that reduced indoor sulfate and carbon levels are primarily due to deposition and penetration losses. However, measured indoor ammonium nitrate levels were often observed to be at significantly lower levels than expected based solely on ... continued below

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Lunden, Melissa M.; Thatcher, Tracy L.; Littlejohn, David; Fischer, Marc L.; Hering, Susanne V.; Sextro, Richard G. et al. January 31, 2002.

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Recent studies associate particulate air pollution with adverse health effects; however, the exposure to indoor particles of outdoor origin is not well characterized, particularly for individual chemical species. In response to this, a field study in an unoccupied, single-story residence in Clovis, California has been conducted. Real-time particle monitors were used both outdoors and indoors to quantify PM2.5 nitrate, sulfate, and carbon. The results show that reduced indoor sulfate and carbon levels are primarily due to deposition and penetration losses. However, measured indoor ammonium nitrate levels were often observed to be at significantly lower levels than expected based solely on penetration and deposition losses. The additional reduction appears to be due to the transformation of ammonium nitrate into ammonia and nitric acid indoors, which are subsequently lost by deposition and sorption to indoor surfaces. The size of the effect is dependent upon factors such as temperature, relative humidity, and ventilation rate.

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  • 9th International Conference on Indoor AirQuality and Climate (Indoor Air 2002), Monterey, CA, June 30-July 5,2002

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  • Report No.: LBNL--50158
  • Grant Number: DE-AC02-05CH11231
  • Grant Number: OTHER:WESTERN PETROLEUM STATESASSOCIATION
  • Office of Scientific & Technical Information Report Number: 861185
  • Archival Resource Key: ark:/67531/metadc784764

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 31, 2002

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  • Dec. 3, 2015, 9:30 a.m.

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  • May 5, 2016, 2:15 p.m.

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Lunden, Melissa M.; Thatcher, Tracy L.; Littlejohn, David; Fischer, Marc L.; Hering, Susanne V.; Sextro, Richard G. et al. The transformation of outdoor ammonium nitrate aerosols in theindoor environment, article, January 31, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc784764/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.