Document Detail


Exposure to fuel-oil ash and welding emissions during the overhaul of an oil-fired boiler.
MedLine Citation:
PMID:  16048845     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The health effects of exposure to vanadium in fuel-oil ash are not well described at levels ranging from 10 to 500 microg/m(3). As part of a larger occupational epidemiologic study that assessed these effects during the overhaul of a large oil-fired boiler, this study was designed to quantify boilermakers' exposures to fuel-oil ash particles, metals, and welding gases, and to identify determinants of these exposures. Personal exposure measurements were conducted on 18 boilermakers and 11 utility workers (referents) before and during a 3-week overhaul. Ash particles < 10 microm in diameter (PM(10), mg/m(3)) were sampled over full work shifts using a one-stage personal size selective sampler containing a polytetrafluoroethylene filter. Filters were digested using the Parr bomb method and analyzed for the metals vanadium (V), nickel (Ni), iron (Fe), chromium (Cr), cadmium (Cd), lead (Pb), manganese (Mn), and arsenic (As) by inductively coupled plasma mass spectrometry. Nitrogen dioxide (NO(2)) was measured with an Ogawa passive badge-type sampler and ozone (O(3)) with a personal active pump sampler.Time-weighted average (TWA) exposures were significantly higher (p < 0.05) for boilermakers than for utility workers for PM(10) (geometric mean: 0.47 vs. 0.13 mg/m(3)), V (8.9 vs. 1.4 microg/m(3)), Ni (7.4 vs. 1.8 microg/m(3)) and Fe (56.2 vs. 11.2 microg/m(3)). Exposures were affected by overhaul time periods, tasks, and work locations. No significant increases were found for O(3) or NO(2) for boilermakers or utility workers regardless of overhaul period or task group. Fuel-oil ash was a major contributor to boilermakers' exposure to PM(10) and metals. Vanadium concentrations sometimes exceeded the 2003 American Conference of Governmental Industrial Hygienists (ACGIH) threshold limit value.
Authors:
Youcheng Liu; Mark A Woodin; Thomas J Smith; Robert F Herrick; Paige L Williams; Russ Hauser; David C Christiani
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of occupational and environmental hygiene     Volume:  2     ISSN:  1545-9624     ISO Abbreviation:  J Occup Environ Hyg     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-07-28     Completed Date:  2006-09-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101189458     Medline TA:  J Occup Environ Hyg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  435-43     Citation Subset:  IM    
Affiliation:
Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA. youcheng.liu@yale.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Air Pollutants, Occupational / adverse effects,  analysis*
Environmental Monitoring / methods*
Fuel Oils / analysis*,  toxicity
Humans
Inhalation Exposure / adverse effects,  analysis*
Middle Aged
Nitrogen Dioxide / analysis
Occupational Exposure / adverse effects,  analysis*
Ozone / analysis
Particle Size
Power Plants / instrumentation
Respiratory Protective Devices
Risk Assessment / methods*
Threshold Limit Values
Vanadium / analysis*,  toxicity
Welding*
Chemical
Reg. No./Substance:
0/Air Pollutants, Occupational; 0/Fuel Oils; 10028-15-6/Ozone; 10102-44-0/Nitrogen Dioxide; 7440-62-2/Vanadium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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