The proportion of long fibres in attapulgite and sepiolite containing adsorption granulates.

Details

• Personal Author:
  Bruckel B ; Pott F ; Rodelsperger K ; Strubel G ; Woitowitz J
• Description:
  An investigation was conducted which evaluated the mineralogical composition and the content of fibers with a length of more than 5 micrometers of adsorption granulates used as animal bedding. The mineralogical composition of 75 commercially available samples of adsorption granulates used as animal bedding was examined by means of X-ray diffraction, polarization and phase contrast microscopy, and differential thermoanalysis. The concentration of fine fibers longer than 5 micrometers in adsorption granulates composed of attapulgite (12174117) and/or sepiolite (63800373) was lower, with a factor of four to 100 in the majority of the samples, than concentrations significantly carcinogenic in injection experiments. Only one animal experiment with a relatively high number of long sepiolite fibers demonstrated a lower carcinogenic effect than experiments with long attapulgite fibers. The main component of adsorption granulates often resembled attapulgite. It was recommended that the physical properties and biological effects of fibrous clays be investigated before deposits are handled.
• Subjects:
  Accidents, Occupational Dust Mining Occupational Health Radiation Radon Respiratory Tract Diseases Safety
• Keywords:
  Airborne Dusts Air Sampling Analytical Methods Cell Function Dust Exposure Fibrous Bodies Lung Cells Mineral Dusts Silica Dusts
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Conference/Symposia Proceedings
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  554-558
• NIOSHTIC Number:
  nn:00198462
• Citation:
  Proceedings of the VIIth International Pneumoconioses Conference, August 23-26, 1988, Pittsburgh, Pennsylvania, USA. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 90-108, 1990 Sep; (Part I):554-558
• CAS Registry Number:
  Palygorskite ([Mg(Al0.5-1Fe0-0.5)]Si4(OH)O10.4H2O) ; Sepiolite (CAS RN 63800-37-3)
• Federal Fiscal Year:
  1990
• Peer Reviewed:
  False
• Part Number:
  I
• Source Full Name:
  Proceedings of the VIIth International Pneumoconioses Conference, August 23-26, 1988, Pittsburgh, Pennsylvania, USA
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4a0f7217cd12fc9990d1480afd7c45f9e1455aa90241482c35d13fd048a4d3b3b6ee2a442aaa3b6f25be7bbe90d8a755c37751bed4660437a2f233bea01a556d
• Download URL:
  https://stacks.cdc.gov/view/cdc/180525/cdc_180525_DS1.pdf
• File Type:
  [PDF - 151.85 KB ]