Download Asbestos in The Natural Environment by H. Schreier PDF

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By H. Schreier

Asbestos minerals have novel homes which lead them to hugely fascinating for commercial use. whereas the well-being risks of asbestos have lengthy been well-known and are good documented within the scientific literature, ecological and environmental study related to asbestos fibers has in simple terms 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 booklet examines non-occupational publicity and environmental results of asbestos in terms of animal and plant progress within the traditional surroundings. significant nutrient imbalances and extra concentrations of hint metals were pointed out as major motives for the bad plant reaction. Given the complexity of the asbestos research and the level of the matter, this e-book makes an attempt to assemble the multitude of topics referring to asbestos within the usual atmosphere with the purpose of contributing to a greater figuring out of the chemical features of asbestos-rich fabrics and their impression on plant growth.

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1984). As shown by Gibbs (1971) organic constituents in chrysotile minerals are relatively small and can be the result of gas adsorption or contamination of packaging materials (Commins and Gibbs 1969). (1980) and Bonneau et al. (1986) have shown that both amphibole and chrysotile asbestos may have dual surface charge characteristics. The extremities of the fibers where the octahedral sheet emerges appear to have a weak positive charge while the lateral surfaces are negatively charged. This would increase the complexity of adsorption analysis.

The problem is enhanced by the fact that California is a water deficient state and water distribution systems for drinking water and irrigation are very extensive and interconnected. Once asbestos rich sediment gets into the system the fibers are distributed over large areas, thus affecting drinking water quality for a large segment of population (Hayward 1984, Jones and McGuire 1987). Other areas of North America with high fiber concentrations in drinking water are the Puget Sound area of Washington State, part of the Appalation Mountains in New York, New Jersey, and Maryland, the Gaspai Peninsula in Quebec, the Duluth area in Minnesota, and sections of New Mexico where groundwater was found to contain high fiber concentrations (Oliver and Murr 1977).

It was felt that such reference materials could do much to improve methodology and reproducibility of medical and biological tests involving asbestos. These reference samples have been described by Timbrell et al. (1968) and their chemical and physical characteristics have been elucidated by Timbrell (1969). These samples have served as reference standards in most analytical work and animal exposure experiments. Some 2 0 years have passed since the initiation of the 43 standard reference samples and progress has been made in gaining a better understanding of fiber characterization.

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