Influence of ambient (outdoor) sources on residential indoor and personal PM2.5 concentrations: analyses of RIOPA data.
Qing Yu Meng,Barbara J. Turpin,Leo R. Korn,Clifford P. Weisel,Maria T. Morandi,Steven D. Colome,Junfeng Jim Zhang,Thomas H. Stock,Dalia M. Spektor,Arthur M. Winer,Lin Zhang,Jong Hoon Lee,Robert Giovanetti,William Cui,Jaymin Kwon,Shahnaz Alimokhtari,Derek Shendell,Jennifer M. Jones,Corice Farrar,Silvia Maberti +19 more
TLDR
The mean of the distribution of ambient contributions across study homes agreed well for themass balance and RCS models, but the distribution was somewhat broader when calculated using the mass balance model with measured air exchange rates.Abstract:
The Relationship of Indoor, Outdoor and Personal Air (RIOPA) study was designed to investigate residential indoor, outdoor and personal exposures to several classes of air pollutants, including volatile organic compounds, carbonyls and fine particles (PM2.5). Samples were collected from summer, 1999 to spring, 2001 in Houston (TX), Los Angeles (CA) and Elizabeth (NJ). Indoor, outdoor and personal PM2.5 samples were collected at 212 nonsmoking residences, 162 of which were sampled twice. Some homes were chosen due to close proximity to ambient sources of one or more target analytes, while others were farther from sources. Median indoor, outdoor and personal PM2.5 mass concentrations for these three sites were 14.4, 15.5 and 31.4 microg/m3, respectively. The contributions of ambient (outdoor) and nonambient sources to indoor and personal concentrations were quantified using a single compartment box model with measured air exchange rate and a random component superposition (RCS) statistical model. The median contribution of ambient sources to indoor PM2.5 concentrations using the mass balance approach was estimated to be 56% for all study homes (63%, 52% and 33% for California, New Jersey and Texas study homes, respectively). Reasonable variations in model assumptions alter median ambient contributions by less than 20%. The mean of the distribution of ambient contributions across study homes agreed well for the mass balance and RCS models, but the distribution was somewhat broader when calculated using the mass balance model with measured air exchange rates.read more
Citations
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Spatial analysis of air pollution and mortality in Los Angeles.
Michael Jerrett,Richard T. Burnett,Renjun Ma,C. Arden Pope,Daniel Krewski,K. Bruce Newbold,George D. Thurston,Yuanli Shi,Norm Finkelstein,Eugenia E. Calle,Michael J. Thun +10 more
TL;DR: The results suggest the chronic health effects associated with within-city gradients in exposure to PM2.5 may be even larger than previously reported across metropolitan areas, and nearly 3 times greater than in models relying on comparisons between communities.
Extended follow-up and spatial analysis of the American Cancer Society study linking particulate air pollution and mortality.
Daniel Krewski,Michael Jerrett,Rick Burnett,Renjun Ma,Edward Hughes,Yuanli Shi,Michelle C. Turner,Pope Ca rd,George D. Thurston,Eugenia E. Calle,Michael J. Thun,Bernardo Beckerman,Patrick F. DeLuca,Norm Finkelstein,K. Ito,D. K. Moore,K. B. Newbold,Tim Ramsay,Zev Ross,Shin H,Barbara Tempalski +20 more
TL;DR: An extended follow-up and spatial analysis of the American Cancer Society Cancer Prevention Study II (CPS-II) cohort was conducted in order to further examine associations between long-term exposure to particulate air pollution and mortality in large U.S. cities.
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Review of relationship between indoor and outdoor particles: I/O ratio, infiltration factor and penetration factor
Chun Chen,Bin Zhao +1 more
TL;DR: In this article, the authors provide an up-to-date revision for both experiment and modeling on relationship between indoor and outdoor particles, using three different parameters: indoor/outdoor (I/O) ratio, infiltration factor and penetration factor.
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Indoor aerosols: from personal exposure to risk assessment
Lidia Morawska,Alireza Afshari,G. N. Bae,Giorgio Buonanno,Giorgio Buonanno,Christopher Y.H. Chao,Otto Hänninen,Werner Hofmann,Christina Isaxon,E.R. Jayaratne,Pertti Pasanen,Tunga Salthammer,Michael S. Waring,Aneta Wierzbicka +13 more
TL;DR: In this article, the authors reviewed existing literature to identify state-of-the-art experimental techniques used for personal exposure assessment; compare exposure levels reported for domestic/school settings in different countries, assess the contribution of outdoor background vs indoor sources to personal exposure; and examine scientific understanding of the risks posed by personal exposure to indoor aerosols.
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The Health Relevance of Ambient Particulate Matter Characteristics: Coherence of Toxicological and Epidemiological Inferences
TL;DR: Progress toward integration of toxicological and epidemiological research results concerning the role of specific physicochemical properties, and associated sources, in the adverse impact of ambient particulate matter (PM) on public health is reviewed.
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