Aqueous Surface Chemistry of Asbestos Minerals

Details

• Personal Author:
  Smith RW
• Description:
  Physicochemical study of the manner in which hydroxyl and other ions leave the surfaces of asbestos mineral as a function of aging time in water. In relatively pure water systems a parallelism is noted between magnesium dissolution and pH change for all asbestos minerals studied. The magnesium and hydroxyl dissolution reactions are diffusion controlled. Silica is more readily dissolved from crocidolite than from either chrysotile or amosite. Electrokinetic work shows that chrysotile placed in water initially has a surface approaching that of pure magnesium hydroxide, but after long aging in water the surface approaches that of nonasbestiform serpentine. Attempts made to relate pretreatment of asbestos fibers to carcinogenicity and fibrogenicity indicate that chrysotile appears more likely to induce tumors in rats than acid treated chrysotile or other asbestos minerals. [Description provided by NIOSH]
• Subjects:
  Acids Carcinogens Occupational Health Safety Water Purification
• Keywords:
  Acidity Ionization NIOSH-Grant Physical-chemistry Surface-energy Water-treatment
• Series:
  Grant Final Reports
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Nevada ; OSHA Region 9
• 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:
  1-18
• NIOSHTIC Number:
  nn:00033499
• NTIS Accession Number:
  PB90-100942
• Citation:
  University of Nevada, Reno, Nevada, 1973 Apr; :1-18
• Contact Point Address:
  Chemical & Metallurgical Engr University of Nevada Reno, Nev 89507
• CAS Registry Number:
  Asbestos (CAS RN 1332-21-4) ; Chrysotile (CAS RN 12001-29-5) ; Crocidolite asbestos (CAS RN 12001-28-4) ; Magnesium (CAS RN 7439-95-4) ; Silica (CAS RN 7631-86-9)
• Federal Fiscal Year:
  1973
• Performing Organization:
  University of Nevada Reno, Reno, Nevada
• Peer Reviewed:
  False
• Start Date:
  19700901
• Source Full Name:
  University of Nevada, Reno, Nevada, Final Progress Report for Grant R01-OH-00332, 18 pages, 23 references
• End Date:
  19760831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:045cf7acfa8043f0d65da907990c312722ec7696f4f8f5a9dfffd1b14848234ebb20802018f342b699faf57ad0f09f2e51ad4162bfa9ca6b8fc9d149dcab084a
• Download URL:
  https://stacks.cdc.gov/view/cdc/217690/cdc_217690_DS1.pdf
• File Type:
  [PDF - 695.42 KB ]