Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

A shelter to protect a passive sampler for coarse particulate matter, PM10-2.5.

Authors
Ott-DK; Peters-TM
Source
Aerosol Sci Tech 2008 Apr; 42(4):299-309
NIOSHTIC No.
20040532
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.
Keywords
Respiration; Respirable-dust; Respiratory-irritants; Particulate-dust; Particulates; Measurement-equipment; Sampling; Samplers
Contact
Thomas M. Peters, University of Iowa, 102 IREH; 100 Oakdale Campus, Iowa City, IA 52242
CODEN
ASTYDQ
Publication Date
20080401
Document Type
Journal Article
Email Address
thomas-m-peters@uiowa.edu
Funding Type
Grant
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008491
Issue of Publication
4
ISSN
0278-6826
Source Name
Aerosol Science and Technology
State
IA
Performing Organization
University of Iowa
TOP