Date of discovery of asbestos

Date of discovery of asbestos A long time ago asbestos was discovered, was used by the Chinese and the ancient Egyptians. And because the main source of the name Asbestos asbestos into the Greek language, and means combustible and decay. The Italians have been able to in the middle of the nineteenth century, to find ways to asbestos fibers and yarn woven, and for usable materials in a variety of fields. After that, the development of the industry globally, has opened the first factory for the manufacture of articles in 1870 in Germany, and in 1900 used asbestos cement sheet wet. Then spread this article in many applications, especially in the field of construction and industry

Dangerous of asbestos


Dangerous asbestos lies in the type of metal material in it and depend Health Effects on duration of human exposure as well as the number of fiber length and strength, and show a close relationship between the length of time of exposure to asbestos fibers and the severity of the exposure and the negative effects on human health, with symptoms of the disease after Chronic exposure to asbestos fibers, which may amount to more than 20 years. As for acute exposure, there are no studies showing its effects on humans. There are two ways main through which exposure to asbestos fibers:
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    First: exposure through the air, or inhalation especially in the workplace, and building on the standards set by the World Health Organization should not exceed asbestos fibers in the air at the workplace for 0.5 f per cubic centimeter, and classified the International Agency for Research on Cancer which is affiliated to the World Health Organization asbestos as a carcinogen by inhalation.

    Second: through drinking water, as shown epidemiological studies carried out by the World Health Organization that the cancer does not increase when swallowing asbestos fibers in drinking water, there is no conclusive evidence so far that the presence of asbestos fibers in the pipes of drinking water poses a risk to the health rights, and that the organization is internationally accredited for setting the standards for drinking water not included asbestos in the list of substances that could pose a risk to human health, especially if found acceptable proportions. The United States Agency for Environmental Protection in America فتعتقد that exposure to asbestos fibers through drinking water may affect human cancers in the digestive system, but the evidence is not definitive.

Also produces on exposure of workers in the production or manufacture of asbestos some of the most serious asbestos diseases and cancer lung and Almizotheleoma.

And asbestos chronic lung disease that affects the lungs as a result of inhaling asbestos fibers which is characterized by its rigor severe, and that reduce the efficiency of the lungs and respiratory tract in general, where there is direct contact between the fiber and the cells in the lung that leads to turning malignant of these cells, and thus result in lung cancer, it was noted that smokers are more susceptible to this disease, which enables gravity in that the symptoms appear after 15 to 20 years old.

Has issued the International Labour Organization Convention No. 162 for the year 1986 at its No. 92, known as "asbestos" and included prohibiting the use of this material in all its forms and replace them with other materials and other products harmless or less harmful as and put this agreement exceptions to the ban in certain cases set the terms of actions and strict measures to ensure that workers are not exposed to risk.

According to a report prepared by the World Health Organization to lung cancer, mesothelioma, and bladder cancer are among the most common types of occupational cancers. The ten cases of lung cancer is closely linked to risks in the workplace. And exposed about 125 million people around the world, to asbestos at work, and at least 90 000 people die each year from diseases linked to that article.
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