The effect of worker's location, orientation, and activity on exposure.
The impact of a worker's location, orientation, and activity was studied in an experimental room (2.86 m x 2.35 m x 2.86 m) at known flow rates of 5.5 m(3)/min and 3.3 m(3)/min. A person in the room, wearing a full-facepiece, air-supplied respirator represented a worker. Propylene tracer gas was emi...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 4; no. 8; pp. 572 - 583 |
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| Autores principales: | , , , |
| Formato: | CEU equations & formulas exam questions research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Aug2007
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106017764&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106017764 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Aug2007 vid: 4 iid: 8 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106017764 106017764 2009607346 10.1080/15459620701455197 NLM17562469 106017764 ppf: 572 ppct: 11 formats: fmt: @attributes: type: P tig: atl: The effect of worker's location, orientation, and activity on exposure. aug: au: Lee E Feigley CE Khan J Hussey JR affil: Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina. Columbia, South Carolina. sug: subj: Environmental Exposure Analysis Occupational Exposure Analysis Air Air Pollutants, Occupational Analysis Analysis of Variance Data Analysis Software Descriptive Statistics Education, Continuing (Credit) Environmental Monitoring Methods Funding Source Motor Activity T-Tests Temperature Ventilation Human ab: The impact of a worker's location, orientation, and activity was studied in an experimental room (2.86 m x 2.35 m x 2.86 m) at known flow rates of 5.5 m(3)/min and 3.3 m(3)/min. A person in the room, wearing a full-facepiece, air-supplied respirator represented a worker. Propylene tracer gas was emitted at a constant rate from a 1-m pedestal at the center of the room and a continuous air sample was drawn from a point midway between the worker's mouth and nose. Breathing zone concentration (BZC) was monitored at 12 worker locations within the room for a stationary worker. At each location, BZCs were measured separately for four worker orientations: east, west, south, and north. BZCs of a walking worker were also monitored along the path defined by the 12 worker locations used in the stationary experiments. In a separate set of experiments, area concentration was monitored to see whether the worker's activity disturbed the contaminant concentrations at a fixed sampling point located behind the source looking from the direction of air inlet (location: 1.34 m, 1.20 m, 0.45 m). The following average differences in BZC over the 12 fixed locations were observed: 43% higher for near-field than for far-field locations; 20% higher when the worker was facing the source than when facing away (p-values for all four conditions: < 0.033), and 30% higher for a moving worker than for a stationary worker (p-values for all four conditions: < 0.01). When the worker was walking, the concentration at the fixed area sampling point was generally lower than the area concentration when the worker was absent or stationary in the room, possibly due to greater mixing of room air by the worker's movement. Because a worker's activities may be irregular and complicated, incorporating them as parameters in mathematical models is often not feasible. Instead, these findings may be used to assess uncertainty or adjust exposure estimates from simple models. pubtype: Academic Journal doctype: CEU equations & formulas exam questions research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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