Estimation of respirable dust exposure among coal miners in South Africa

Journal of Occupational and Environmental Hygiene
Rajen N NaidooT G Robins

Abstract

The use of retrospective occupational hygiene data for epidemiologic studies is useful in determining exposure-outcome relationships, but the potential for exposure misclassification is high. Although dust sampling in the South African coal industry has been a legal requirement for several decades, these historical data are not readily adequate for estimating past exposures. This study describes the respirable coal mine dust levels in three South African coal mines over time. Each of the participating mining operations had well-documented dust sampling information that was used to describe historical trends in dust exposure. Investigator-collected personal dust samples were taken using standardized techniques from the face, backbye (underground jobs not at the coal face), and surface from 50 miners at each mine, repeated over three sampling cycles. Job histories and exposure information was obtained from a sample of 684 current miners and 188 ex-miners. Linear models were developed to estimate the exposure levels associated with work in each mine, exposure zone, and over time using a combination of operator-collected historical data and investigator-collected samples. The estimated levels were then combined with work history in...Continue Reading

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Citations

Jul 2, 2008·Environmental Monitoring and Assessment·M Onder, E Yigit
Oct 6, 2007·American Journal of Industrial Medicine·Rajen N NaidooMary Lou Thompson
Nov 9, 2019·International Archives of Occupational and Environmental Health·Sithembile L MabilaJill Murray
May 11, 2021·Archives of Environmental & Occupational Health·Shivkumar S PrajapatiSarang V Dhatrak

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