Study on the thermal decomposition of chrysotile asbestos

被引：0
作者：
T. Zaremba
A. Krząkała
J. Piotrowski
D. Garczorz
机构：
[1] Silesian University of Technology,Department of Chemistry, Inorganic Technology and Fuels
来源：
Journal of Thermal Analysis and Calorimetry | 2010年 / 101卷
关键词：
Chrysotile asbestos; Grinding; Low temperature treatment; SEM; Thermal analysis; XRD;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This article reports the possibility of detoxification of chrysotile asbestos through a low temperature heating and grinding treatment. The effect of thermal treatment at different temperatures in the range from 500 to 725 °C for 3 h on raw natural asbestos was characterized by thermal analysis, X-ray diffraction, and scanning electron microscopy. It was found that an isothermal treatment at 650 °C caused the complete dehydroxylation of chrysotile Mg3Si2O5(OH)4. Transformation of the dehydroxylated phase to forsterite Mg2SiO4 was obtained by heat treatment in the range 650–725 °C. The study of microstructure changes of heated asbestos show the destruction of characteristic fibers of chrysotile and formation of strips of forsterite. It is easily milled to pulverulent-shape material by mechanical milling in vibratory mill.
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页码：479 / 485
页数：6
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[1]  
Masiuk S(1998)Azbest–dobre i złe oblicze Ekoplast 13 5-19
[2]  
Masiuk M(2006)Eksploatacja i usuwanie wyrobów zawierających azbest Materiały Budowlane 11 46-48
[3]  
Dyczek J(2007)Azbest—występowanie, wykorzystanie i sposób postępowania z odpadami azbestowymi Gospodarka Surowcami Mineralnymi 31 49-61
[4]  
Pyssa J(2003)Asbestos: old foe in 21st century developing countries Sci Total Environ 307 1-9
[5]  
Rokita GM(2002)Zagrożenia związane z obecnością azbestu w wyrobach budowlanych Ekologia i Technika 10 178-184
[6]  
Harris LV(2002)Korozja wyrobów azbestowo–cementowych i wynikające z niej ryzyko emisji azbestu Cement Wapno Beton 7/69 270-275
[7]  
Kahwa IA(2004)Narażenie i skutki zdrowotne Bezpieczeństwo Pracy 2 2-6
[8]  
Korona L(1998)Mechanisms of asbestos—induced nitric oxide production by rat alveolar macrophages in inhalation and in vitro models Free Radic Biol Med 24 778-788
[9]  
Zamorska H(1998)Hazard of white asbestos Lancet 352 322-323
[10]  
Czekaj A(2003)Reduction of the biological potential of chrysotile asbestos arising from conditions of service on brake pads Regul Toxicol Pharm 38 71-77
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