Thermogravimetric Analysis of Respirable Coal Mine Dust for Simple Source Apportionment

Details

• Personal Author:
  Afrouz SG ; Agioutanti E ; Jaramillo L ; Keles C ; Sarver E
• Description:
  Resurgence of coal mine dust lung diseases in the central Appalachian region of the United States and elsewhere has spurred a range of efforts to better understand respirable coal mine dust (RCMD) exposures and sources. Thermogravimetric analysis (TGA) of RCMD samples can enable the dust mass to be fractionated into three main components: coal, non-carbonate minerals, and carbonates. These are expected to approximate, respectively, the three primary dust sources in many underground mines: the coal seam being mined, the surrounding rock strata (i.e., typically dominated by non-carbonate minerals) being drilled or mined along with the coal, and the rock dust products (i.e., typically made from carbonate-rich limestone or dolostone) being applied in the mine to mitigate explosibility hazards. As proof of concept, TGA was applied to respirable dust samples that were laboratory-generated from real source materials representing 15 mines. Except in the case of two mines, compositional results were generally consistent with expectations. TGA was also applied to RCMD samples collected in standard locations of 23 mines (including the 15 mines represented by the dust source materials). Results showed significantly different compositions with respect to sampling location and geographic region (i.e., within and outside of central Appalachia). To further interpret the RCMD results, a simple source apportionment model was built using the dust compositions yielded from the source materials analysis. Model results indicated that, on average, about twice as much dust was sourced from mining into rock strata than from mining the target coal seam. This finding is particularly important for mines extracting relatively large amounts of rock along with the coal or for mines that frequently encounter high-silica rock strata. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Dust Lung Lung Diseases Mining Occupational Health Respiratory System Respiratory Tract Diseases Safety
• Keywords:
  Author Keywords: Coal Worker's Pneumoconiosis Black Lung Disease Coal Mines Coal Seams Coal Workers Pneumoconiosis Geologic Strata Occupational Health Progressive Massive Fibrosis Respirable Dust Rock Mechanics Underground Mines

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• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  19
• Issue:
  9
• NIOSHTIC Number:
  nn:20066579
• Citation:
  J Occup Environ Hyg 2022 Sep; 19(9):568-579
• Contact Point Address:
  Emily Sarver, Department of Mining and Minerals Engineering, Virginia Tech, Blacksburg, Virginia
• Email:
  esarver@vt.edu
• CAS Registry Number:
  Quartz (SiO2) (CAS RN 14808-60-7)
• Federal Fiscal Year:
  2022
• Performing Organization:
  Virginia Polytechnic Institute & State University
• Peer Reviewed:
  True
• Start Date:
  20190903
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:14ae618e9a3d8e91ce7e20870a2e4eb2b1e8a3c546a2b76b1defa373aaad713e09eef5c2a27bd96dc7dd01f973ca2716c685f9f83c27c073f9234bda35266648
• Download URL:
  https://stacks.cdc.gov/view/cdc/231128/cdc_231128_DS1.pdf
• File Type:
  [PDF - 2.07 MB ]