Get Asbestos in The Natural Environment PDF

By H. Schreier

ISBN-10: 0080874967

ISBN-13: 9780080874968

ISBN-10: 0444880313

ISBN-13: 9780444880314

Asbestos minerals have novel homes which lead them to hugely fascinating for commercial use. whereas the healthiness risks of asbestos have lengthy been well-known and are good documented within the clinical literature, ecological and environmental learn related to asbestos fibers has simply been undertaken long ago 25 years and the numerous deleterious results of asbestos fabrics on soil and plant ecology has been less good publicised.

This ebook examines non-occupational publicity and environmental results of asbestos on the subject of animal and plant development within the common surroundings. significant nutrient imbalances and extra concentrations of hint metals were pointed out as major factors for the terrible plant reaction. Given the complexity of the asbestos research and the level of the matter, this ebook makes an attempt to compile the multitude of matters referring to asbestos within the common atmosphere with the purpose of contributing to a greater knowing of the chemical features of asbestos-rich fabrics and their impact on plant growth.

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In the early 1980's 34 world production was estimated to be in the order of 5 million metric tons (Shugar 1979, Ney 1986) but production has since declined. Between 1947 and 1974 Canada supplied between 40-60% of the world asbestos, butthis has now declined to less than 30% and the USSR is now the leading supplier (Shugar 1979). South Africa is supplying between 7-10% of asbestos and most of the industrial grade amosite and crocidolite asbestos originated from there. A list of producer countries and their potential capacity are provided in Table 6 below.

This alteration process, which is known as serpentinization, is widespread and as a result chrysotile asbestos is likely to be present in most serpentinized ultramafics in the world, but the quality and quantity are rarely sufficient for commercial exploitation. The most common mineral constituents of ultramafic rocks are olivine, pyroxene, and hornblend and the dominant rocks are dunite (mostly olivine), pyroxenite (mostly pyroxene), peridotites (olivine rich with some pyroxene), and harzburgite (mostly olivine and pyroxene with some plagioclase).

The dynamic nature of these processes in different environments requires careful fiber analysis before and after each experiment using such techniques as scanning electron microscopy, electron microprobe analysis, mass spectroscopic analysis, and scanning auger spectroscopy (Spurny 1983, Pathak and Sebastien 1985, Verlinden et al. 1985, Jolicoeur and Poisson 1987). The adsorption of selective molecules is pertinent because many have the capacity to alter fiber properties for industrial purposes and some might be possible causes for malignancy.

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Asbestos in The Natural Environment by H. Schreier


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