Journal article
A Shelter to Protect a Passive Sampler for Coarse Particulate Matter, PM10 − 2.5
Aerosol science and technology, Vol.42(4), pp.299-309
03/03/2008
DOI: 10.1080/02786820802054236
Abstract
This work designed and tested a shelter to protect a passive sampler for measuring coarse particulate matter, PM
10 − 2.5
. The shelter protects the sampler from precipitation and reduces the effects of wind on the deposition of particles to its collection surface. Six shelters were tested in a wind tunnel at three wind speeds: 2, 8, and 24 km hr
−1
. Shelter performance was expressed as the ratio of PM
10 − 2.5
measured with the passive samplers to that measured with a filter-based dichotomous sampler. For most shelters, the PM
10 − 2.5
ratio averaged across wind speeds was well above one (2.4 to 8.5) and was generally dependent on wind speed. However, the PM
10 − 2.5
ratio for one shelter, the Flat Plates shelter, was 1.04 with substantially less effect on particle deposition from wind speed. Eight week-long field tests were conducted to compare PM
10 − 2.5
measured with a passive sampler installed in a Flat Plates shelter to that measured with a collocated filter-based dichotomous sampler. In these tests, the mean PM
10 − 2.5
ratio was 1.29. The linear relationship between PM
10 − 2.5
measured passively to that measured with the filter-based sampler had a Pearson correlation coefficient of 0.97 and was not significantly affected by the addition of weekly mean wind speed (p = 0.35). Although temperature was significant in this regression model (p = 0.02), it only improved the relationship marginally. The passive sampler in a Flat Plates shelter offers an inexpensive means to assess ambient PM
10 − 2.5
without on-site measurement of wind speed.
Details
- Title: Subtitle
- A Shelter to Protect a Passive Sampler for Coarse Particulate Matter, PM10 − 2.5
- Creators
- Darrin K Ott - Department of Occupational and Environmental Health , University of IowaThomas M Peters - Department of Occupational and Environmental Health , University of Iowa
- Resource Type
- Journal article
- Publication Details
- Aerosol science and technology, Vol.42(4), pp.299-309
- DOI
- 10.1080/02786820802054236
- ISSN
- 0278-6826
- eISSN
- 1521-7388
- Publisher
- Taylor & Francis Group
- Language
- English
- Date published
- 03/03/2008
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Occupational and Environmental Health
- Record Identifier
- 9984214793102771
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