Asbestos or asbestos, and also called asbestos, and it is called in Arabic Hariri rock or asbestos. It consists of a crystalline material unformed composed of several natural metal silicate salts such as magnesium, calcium, and iron in the first class. And is extracted from the private mines contain many natural minerals, within the composition of silicate salts, but they differ from each other in terms of chemical composition and natural properties, the different amounts of magnesium, iron, sodium and oxygen, as well as quantities of hydrogen in it.Dr Aadisan Ibrahim Abuabdon, from the Department of Basic Science University of Sharjah, said that asbestos containing forty or fifty percent silica, as well as iron oxide, magnesium and others, has popularized the use of this rock fibrous and easy to manufacture silk, in buildings and thermal facilities, and
also in some clothes during the thirties of the last century, to show its fibers resist burning and enjoying thermal insulation.Later known pastes and templates asbestos or Aleighternit in great demand after the second war, a thermal insulator for buildings and furnaces or pipe conveyors for hot water, and even in the automotive industry, clothing fire workers, despite early warnings of health damage to the dust of asbestos, as used in cement sheeting manufactured way wet, then this article has spread to many uses, especially in the field of construction and industry.
ويضيف أبو عبدون: في عام 1989 أصدرت وكالة حماية البيئة في أميركا، حظرا على إنتاج مادة الإسبستوس للتخلص التدريجي من تلك المادة، وصنفت الوكالة الدولية لأبحاث السرطان، وهي تابعة لمنظمة الصحة العالمية، الإسبستوس كمادة مسرطنة وذلك عن طريق الاستنشاق.">He adds Abu Abdoun: in 1989 issued the Environmental Protection Agency in the United States, a ban on the production of asbestos to phase out the substance, and classified the International Agency for Research on Cancer, a subsidiary of the World Health Organization, asbestos as a carcinogen by inhalation. It uses asbestos since before World War II, but the growing use with the war, and until the early seventies of the nineteenth century, and although that period were not safety precautions and procedures inadequate or non-existent, but the use of these products dropped dramatically after that, because of the perception and the increasing spread of the risks of asbestos, to the extent the withdrawal of most of its products from the market and a lack of commercial demand. This careful not to deal with that substance has increased, and the reason for that concern is increasing the number of environmental and health bodies that spread awareness about the dangers of asbestos, even has surrounded its products and traded but was a complete ban on these products.Causing asbestos diseases pulmonary chronic, as a result of inhalation of its fibers, which is characterized by extreme accuracy and that reduce the efficiency of the lungs and respiratory system in general, where a direct connection between the fibers and cells occurs in the lungs, leading to malignant transformation of these cells and thus result in lung cancer, and enables gravity that the symptoms appear after 15 or 20 years.Dr. Obuabdon and complements the use of asbestos meets every caution by the authorities concerned health, safety and environmental matters, where all signs point to the possibility of stomach and bowel cancer, as a result of drinking the same concentrations of water rising from asbestos for a long time, so being since the eighties of the last century, replace those pipes and other use do not contain asbestos.Dr. Obuabdon explains that there are multiple diseases that afflict those who are exposed to this article, the intensity and seriousness of the disease depends on the degree of asbestos dust, smokers and is more susceptible to infection than others almost twice, in the case of inhalation of the dust of this article.
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