By H. Schreier
Asbestos minerals have novel houses which cause them to hugely fascinating for commercial use. whereas the future health dangers of asbestos have lengthy been well-known and are good documented within the clinical literature, ecological and environmental learn concerning asbestos fibers has merely been undertaken some time past 25 years and the numerous deleterious results of asbestos fabrics on soil and plant ecology has been less good publicised.
This e-book examines non-occupational publicity and environmental results of asbestos in relation to animal and plant development within the typical setting. significant nutrient imbalances and extra concentrations of hint metals were pointed out as major factors for the negative plant reaction. Given the complexity of the asbestos research and the level of the matter, this publication makes an attempt to collect the multitude of matters bearing on asbestos within the usual setting with the purpose of contributing to a greater realizing of the chemical features of asbestos-rich fabrics and their impression on plant growth.
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Additional info for Asbestos in The Natural Environment
23 TABLE 5 Trace metal content in Serpentine and amphibole asbestos co Chrvsot ile: uicc uicc ~ ~~ UlCC UlCC UlCC Canadian Canadian Canadian Canadian Canadian African African Others Others Others Crocidolite: UlCC UlCC African African Amosite: UlCC UlCC African Others AnthoDhvllita: UlCC Others Tremoiitg: Others 45-54 40-41 43-54 45-55 46-55 36-78 39-110 44-110 38-60 19-43 54-55
In such operations it is not unusual to have an overburden to mineral ratio greater than 3:l and this requires large amounts of overburden materials to be moved and deposited. Much of this waste material contains asbestos either by association or mixing during the mining process. Asbestos ore which is actually mined has to go through a screening and sorting process and another 5 0 80% of the ore is eliminated and returned to the site as waste material. Much asbestos bearing rock has been quarried and is in frequent use for road fill and other construction purposes.
Filter devices alone and in combination with image analysis are also used as techniques to determine fiber numbers in samples. These have been perfected by aligning the fibers according to their magnetic properties (Timbrel1 1975) and sizing the fibers with computer based video imaging techniques. By far the most reliable measuring technique is still the manual counting of fibers on transmission electron microscopes (TEM). This is done after samples are filtered through carbon coated Nuclepore filter, mounted on a copper grid and the filter paper dissolved with chloroform (Chatfield 1979).
Asbestos in The Natural Environment by H. Schreier