Annals of Occupational Hygiene Advance Access published online on April 21, 2005
Annals of Occupational Hygiene, doi:10.1093/annhyg/mei013
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1 Centre for International Health, Faculty of Medicine, University of Bergen, Armauer Hansens Hus, N-5021 Bergen, Norway; Section for Occupational Medicine, Institute of Public Health and Primary Health Care, University of Bergen, Kalfarvei 31, N-5018 Bergen, Norway
* To whom correspondence should be addressed. Dust exposure levels were studied in a cement factory in Dar es Salaam, Tanzania, as part of an epidemiological study assessing chronic respiratory health effects. One hundred and twenty personal ‘total’ dust samples were collected from 80 randomly selected workers from eight a priori occupational groups (OGs) based on work areas using a 37 mm Millipore sampler. The between-group, within-group and within-worker variances were determined to assess the contrast in exposure level between the OGs and to estimate the attenuation and standard error of the theoretical exposure-response slope. Using mixed-effect model estimates, the probability of overexposure relative to the occupational exposure limit (OEL) was assessed for each OG. The geometric means of total dust exposure were higher in the cranes (38.64 mg m-3), packing (21.30 mg m-3) and crusher (13.48 mg m-3) than in the cement mill (3.23 mg m-3), kiln (2.87 mg m-3), raw mill (1.85 mg m-3), maintenance (1.16 mg m-3) and administration (0.29 mg m-3). The a priori grouping scheme seems to be an efficient scheme because of the high contrast in exposure level between the OGs (0.78) and minimal attenuation of the theoretical exposure-response slope (1.0%). When using the reduced mixed-effect model, the probabilities of overexposure (
Received July 2, 2004
Accepted February 26, 2005
Article
Variability in Dust Exposure in a Cement Factory in Tanzania
2 Section for Occupational Medicine, Institute of Public Health and Primary Health Care, University of Bergen, Kalfarvei 31, N-5018 Bergen, Norway
3 Department of Environmental Health, University of Washington, P.O. Box 357234, Seattle, WA 98195-7234, USA
Julius Mwaiselage, E-mail: jmwaiselage{at}yahoo.com
Abstract 
) relative to the OEL of 10 mg m-3 for total cement dust were higher in the crane (96%), packing (88%) and crusher (73%) than in the cement mill (16%), kiln (14%), raw mill (5%), maintenance (2%) and administration (0.01%).
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  K. Hagstrom, C. Lundholm, K. Eriksson, and I. Liljelind Variability and Determinants of Wood Dust and Resin Acid Exposure during Wood Pellet Production: Measurement Strategies and Bias in Assessing Exposure-Response Relationships Ann. Hyg., November 1, 2008; 52(8): 685 - 694. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S Pournourmohammadi, P Khazaeli, S Eslamizad, A Tajvar, A Mohammadirad, and M Abdollahi Study on the oxidative stress status among cement plant workers Human and Experimental Toxicology, June 1, 2008; 27(6): 463 - 469. [Abstract] [PDF]
|
|
|
|
|
|
S. H. D. MAMUYA, M. BRATVEIT, J. MWAISELAGE, and B. E. MOEN Variability of Exposure and Estimation of Cumulative Exposure in a Manually Operated Coal Mine Ann. Hyg., October 1, 2006; 50(7): 737 - 745. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. SYMANSKI, S. MABERTI, and W. CHAN A Meta-Analytic Approach for Characterizing the Within-Worker and Between-Worker Sources of Variation in Occupational Exposure Ann. Hyg., June 1, 2006; 50(4): 343 - 357. [Abstract] [Full Text] [PDF]
|
|