Asbestiform fibers

These fibrous minerals share several properties which qualify them as asbestiform fibers (/) they are found in large clusters which can be easily separated from the host matrix or cleaved into thinner fibers (1) (2) the fibers exhibit high tensile strengths (1) (J) they show high length diameter ratios, from a minimum of 20 up to >1000 (1) (4) they are sufficiendy dexible to be spun and (5) macroscopicaHy, they resemble organic fibers such as cellulose (2). 

Using radioactive labeled UICC samples, the deposition and distribution of asbestiform fibers in the pulmonary cavity have been studied. For example, after thirty minutes of inhalation, the deposition of fibers in the respiratory track was shown to be proportional to the median aerodynamic particle diameter for the two UICC chrysotiles, amosite, anthophyllite, and crocidolite. The percentage of total deposited fiber in the lower respiratory tract varied inversely as the square root of the particle diameter (Morgan et al., 1975). 

Breslow, L. (1984). Nonoccupational health risks of asbestiform fibers. Committee on Nonoccupational Health Risks of Asbestiform Fibers, Board of Toxicology and Environmental Health Hazards, Commission on Life Sciences, National Research Council, Washington, DC. 

Although there are a number of contradictory reports regarding the effects of talc, the contradiction has been ascribed to the differences in mineral composition of the various talcs, which include pure talc, talc associated with silica and other nonasbestiform minerals, and talc containing asbestiform fibers such as tremolite and anthophyllite. ... 

NRC. 1984. National Research Council. Asbestiform fibers Nonoccupational health risks. Washington, DC National Academy Press. 

Based on laboratory jar testes, the optimum pH range for flocculation-destabilization was defined. Asbestiform fiber reduction during effluent treatment, after flocculation-sedimentation and filtration, was also evaluated. 

Several fillers, ineluding asbestos, nickel, and soot, are carcinogens. The health risk due to asbestos exposure is well documented. Exposure to asbestos increases the risk of lung cancer, mesothelioma, asbestosis, pleural thickening, and gastrointestinal cancer. The first four diseases are caused by inhalation of asbestiform fibers, whereas the last is caused by ingestion. 

Asbestiform Fibers. Non-occupational Health Risks. National Academy Press, Washington,... 

Talc containing asbestiform fibers Lung (0eura)... 

Direct Filtration of Lake Superior Water for Asbestiform Fiber Removal, ... 

Talc containing asbestiform fibers Tamoxifen and its salts Terrazole... 

The nominal chemical compositions for the asbestos minerals were given in Section 1. Compared to cleavage fragments of the same minerals, asbestiform fibers possess a high tensile strength along the fiber axis. They are... 

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