Grantee Research Project Results
2008 Progress Report: PM Characterization and Exposure Assessment (Project 2)
EPA Grant Number: R832417C002Subproject: this is subproject number 002 , established and managed by the Center Director under grant R832417
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: Center for the Study of Childhood Asthma in the Urban Environment
Center Director: Hansel, Nadia
Title: PM Characterization and Exposure Assessment (Project 2)
Investigators: Geyh, Alison , Breysse, Patrick N.
Current Investigators: Geyh, Alison , Ondov, John M. , Breysse, Patrick N. , Rule, Ana , Han, Inkyu , Ramos-Bonilla, Juan , Datta, Saugatta , Chillrud, Steven
Institution: The Johns Hopkins University
Current Institution: The Johns Hopkins University , Kansas State University , Lamont Doherty Earth Observatory of Columbia University , University of Maryland - College Park
EPA Project Officer: Chung, Serena
Project Period: October 1, 2005 through September 30, 2010
Project Period Covered by this Report: October 1, 2007 through September 30,2008
RFA: Particulate Matter Research Centers (2004) RFA Text | Recipients Lists
Research Category: Human Health , Air
Objective:
Approach:
We will collect bulk PM samples for bioassays and bulk and integrated samples for detailed characterization to include mass, inorganic ions, elemental carbon and organic compounds, specifically polycyclic aromatic hydrocarbons , elemental metals and their oxides, and sulfur isotope ratios. We will also evaluate PM characteristics in relation to particle size. We will use this matrix of information to characterize differences in PM composition and biological response by location. The objectives of Project 2 include: 1) developing new methods for collecting bulk PM for use in biological assays; 2) developing a portable system the characterization of chemical and physical properties of ambient PM; 3) identifying specific regional differences in PM characteristics that may contribute to differential biological responses in vitro and in vivo bioassay systems; and 4) assessing a relationship between human exposure to PM2.5 and biological response during a high PM2.5 exposure period and a low PM2.5 exposure periods. By successfully completing this project, we anticpate providing a better understanding of how differences in physiochemical composition impact PM health effects.
Progress Summary:
Table 1. Monitoring Schedule
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Order
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County
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Start Date
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End Date
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1
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King, WA*
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October 25, 2007
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December 1, 2007
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2
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Sacramento CA*
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January 12, 2008*
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March 13, 2008
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3
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Maricopa AZ*
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June 1, 2008
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July 20, 2008
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4
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Hennepin MN**
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September 15, 2008
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October 30, 2008
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5
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Harris TX
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February 1, 2008
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April 30, 2008
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6
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Allegheny PA
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June 1, 2009
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July 15, 2009
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7
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Jefferson KY
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TBD
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TBD
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8
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Kings NY
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TBD
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TBD
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9
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Pinellas FL
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TBD
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TBD
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Table 2. Summary of PM Sampling
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Continuous PM Monitoring Instruments
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Integrated PM Sampling Instruments
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Type
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Analyte (units)
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Sampling Frequency
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Type
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Analyte
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Collection Frequency
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No. samples per sampling period
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TSI Aerosol Particle Sizer
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<0.5 - 20 um (particle counts/cm3)
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every 15 min
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Hopkins Sequential Cyclone System
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coarse PM
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integrated over entire site monitoring period
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1
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fine PM
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integrated over entire site monitoring period
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1
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||||
TSI Scanning Mobility Particle Analyzer
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17.9 - 881.7 nm (particle counts/cm3)
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every 15 min
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Harvard Impactor (Telfon filters)
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PM10
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7 days
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2
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PM2.5
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7 days
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2
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||||
Echochem PAS2000
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un-differentiated particle-bound PAHs (ng/m3)
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every 5 min
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PMASS (quartz fiber filters)
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PM2.5
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7 days
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4
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Magee Scientific Aethalometer
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black carbon (ng/m3)
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every 5 min
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|
|
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Thermo Environmental SPA 5020
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particulate sulfate (ug/m3)
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every 15 min
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Table 3. Bulk PM mass results
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Site
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Dates
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Coarse PM (mg)
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Fine (mg)
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Seattle
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Nov 2007
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89
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705
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Sacramento
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Feb / Mar 2008
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111
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397
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Baltimore
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Apr / May 2008
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325
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1551
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Phoenix
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Jun / Jul 2008
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1181
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1510
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Type
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Mass
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Inorganic Ions
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Soluble Metals
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Insoluble Metals
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Elemental carbon
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Pt-Group Elements
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PAHs
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Oxidation States
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HI - PM10
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P#
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P#
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P#
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P#
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|
P
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|
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HI - PM2.5
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P#
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P#
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P#
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P#
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|
P
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|
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PMASS - PM2.5
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|
|
|
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P
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P
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PM Bulk Coarse
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P
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P
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P
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P
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P
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P
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P
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P
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PM Bulk Fine
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P
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P
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P
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P
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P
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P
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P
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P
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Expected Results:
We anticipate that the results of this project will inform PM air quality regulations, suggesting new PM exposure metrics that can be used to modify existing air monitoring networks. Project investigators are well qualified to conduct this research and this project leverages support from a wide range of funded projects, including data from existing air quality databases and resources from a previously EPA funded PM Supersite.
Future Activities:
Journal Articles:
No journal articles submitted with this report: View all 13 publications for this subprojectSupplemental Keywords:
air pollution, PM10, mobile sources, Bulk particle collection, cyclone, exhaled breath condensate, markers of inflammation, RFA, Health, Scientific Discipline, PHYSICAL ASPECTS, Air, particulate matter, Health Risk Assessment, Epidemiology, Risk Assessments, Physical Processes, atmospheric particulate matter, acute cardiovascular effects, long term exposure, atmospheric particles, airway disease, exposure, ambient particle health effects, human exposure, ultrafine particulate matter, atmospheric aerosol particles, aersol particles, particulate matter components, cardiovascular diseaseRelevant Websites:
www.jhsph.edu/particulate_matterProgress and Final Reports:
Original AbstractMain Center Abstract and Reports:
R832417 Center for the Study of Childhood Asthma in the Urban Environment Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R832417C001 Estimation of the Risks to Human Health of PM and PM Components
R832417C002 PM Characterization and Exposure Assessment (Project 2)
R832417C003 Biological Assessment of the Toxicity of PM and PM Components
The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.
Project Research Results
2 journal articles for this subproject
Main Center: R832417
89 publications for this center
64 journal articles for this center