By H. Schreier
Asbestos minerals have novel houses which cause them to hugely fascinating for commercial use. whereas the overall healthiness dangers of asbestos have lengthy been famous and are good documented within the scientific literature, ecological and environmental learn related to asbestos fibers has purely 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 on the subject of animal and plant progress within the ordinary atmosphere. 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 publication makes an attempt to compile the multitude of topics relating asbestos within the traditional surroundings with the purpose of contributing to a greater knowing of the chemical features of asbestos-rich fabrics and their influence on plant growth.
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Additional resources for Asbestos in The Natural Environment
Ai. Cralley et al. 1968 4 Morgan et al. 1973 5. Hoimes at al. Lockwood 1974 7. Cralley et al. Upretiet al. Barbeau et al. 1985 1 1. 5 Techniauesused: HF/AA = Hydrofluorlcacid digestion & Atomic Absorption Spectr. NAc = Neutron Activation Techn. XFL = X-Ray FluorescenceTechn. HCIIAA = HCI digestion and Atomic Absorption Spectrometry NI = Techniquenot identified In comparison with most other non-metallic minerals in the environment the nickel, chromium and manganese values in many of these asbestos samples are exceptionally high.
Ssedanne(1981) Yugoslavia Greece C C SP SP NCentmlVennont California Arizona Georgla-Maryland NewJersey C&T Croatla TransMol Lyndenburg AsbestosType: C =Chrpatne =Tremolite An = Anthophyllrte A =Am& Cr = Croclddite T 81 BI u = Ultramaflc Rock s e = SerpentineRock P = Perlddits As= H&I = Do= AL= BI = SP= D = AM= s&c= us = w m I World Distributioi of Asbestos Bearing Serpentine Rocks and Soils Fig. 4. Distribution o f asbestos bearing serpentinitic bedrock in the world (after Brooks 1987, Kruckeberg 1984 and Hodgson 1986).
In amphiboles no detectable changes were observed by acid leaching and zero point charge is generally negative for all amphiboles (Ralston and Kitchener 1975, b i g h t and Wei 1977). The magnitude of the zeta potential of crocidolite, amosite and anthopholite is about the same as unleached chrysotile but amphiboles have reversed polarity. Surfactants can be adsorbed to the fiber surfaces and this reduces the zeta potential. A s noted by b i g h t and Wei (1977) such reductions are considerably higher in the amphiboles, crocidolite and amosite than in chrysotile.