Estimate of Botanical Ingredients in Respirable Cotton Dust

Details

• Personal Author:
  Morey, Philip R.
• Description:
  The plant part composition of respirable raw cotton dust was investigated to specify a standard reference material for continuing investigations of byssinosis etiology. The percentage weight content of each gross botanical trash component in the seven raw cotton grade divisions was analyzed. The capacity of each type of plant trash to produce respirable particulates during an abrasive milling process was determined by simulating early steps in the raw cotton processing operation. Botanical trash analyses were performed on a total of 71 raw cottons, including samples from each of the grade divisions. The friability of each trash component was determined by roller milling plant material greater than 500 micrometers in diameter, and sifting the pulverized remains on a 10 micrometer mesh screen, then recovering particulate that was less than 10 micrometers. The percentages of each milled plant material converted into respirable particulate were: 29 percent wood, 28 percent bract, 19 percent exo/mesocarp, 16 percent petiole, 5.6 percent leaf blade, 2.5 percent nightshade weed, 2.4 percent endocarp, and 0.3 percent seedcoat. The authors estimated the ratio for composition of respirable dust to be 58:22:20 in bract:leaf:weeds, 99:1 in seedcoat:seedmeat, and wood to petiole was 37:63. They concluded that leaflike dust (largely bract) was most concentrated in respirable particulates. The stem bark and exo/mesocarp made smaller but significant contributions to dust less than 10 micrometers in diameter, while the contribution of the seed and endocarp was minimal. The relative percentage composition of each botanical ingredient did not vary greatly between the different grades, however the total amount of botanical dust was predicted to vary with each grade. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Occupational Health Particulate Matter Respiratory Tract Diseases Safety Textile Industry
• Keywords:
  Airborne-particulates Airway-response-disorders Control-technology; Cotton-ginning NIOSH-Grant Particulate-dust Pathogenesis Plant-fibers Pulmonary-system-disorders Respiratory-system-disorders Standards Textile-workers Textiles-industry

  More +
• Series:
  Grant Final Reports
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  OSHA Region 6 ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-20
• NIOSHTIC Number:
  nn:00091814
• Citation:
  Rockville, MD: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, R01-OH-000667, 1979 Jan; :1-20
• Contact Point Address:
  Biological Sciences Texas Tech University Post Office Box 4149 Lubbock, Ten 79409
• Federal Fiscal Year:
  1979
• NORA Priority Area:
  Pulmonary System Disorders
• Performing Organization:
  Texas Tech University
• Peer Reviewed:
  False
• Start Date:
  19770601
• Source Full Name:
  National Institute for Occupational Safety and Health
• End Date:
  19790531
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8323cc6ca94ac4f6995132367fa3671a2f4b27d129ded482a2cd7589a74561b1b3b8b310142e0afeef0a9365e2c129a73d97cd7f20af7b5034a75a62f5f47ffc
• Download URL:
  https://stacks.cdc.gov/view/cdc/217700/cdc_217700_DS1.pdf
• File Type:
  [PDF - 2.57 MB ]