Chrysotile asbestos and amphibole asbestos should be treated differently.
Release time:
2016-08-19
Source:
A large number of views and publicity regarding the carcinogenicity of asbestos , It should refer to amphibole asbestos. , Such as blue asbestos, etc. The former State Economic and Trade Commission announced that, starting from... 2002 Year 7 Moon 1 Production, use, and import of amphibole asbestos will be phased out starting from the date specified. At the 10th Conference of the Rotterdam Convention, five types of amphibole asbestos were adopted. ( Including crocidolite, amosite, tremolite asbestos, actinolite asbestos, and anthophyllite asbestos, among others. ) Included in the list of hazardous chemicals (PIC) 。
People often confuse chrysotile asbestos with amphibole asbestos—and that’s perfectly normal, since asbestos belongs to the amphibole group. ( Blue asbestos, etc. ) Serpentine minerals ( Chrysotile asbestos ) A general term for asbestos belonging to the serpentine and amphibole groups. According to available data, chrysotile asbestos and amphibole asbestos differ significantly in their degree of harm after being inhaled into the human lungs, owing to differences in their formation conditions and chemical compositions. Blue asbestos and crocidolite, both belonging to the amphibole group, are widely recognized as carcinogenic substances.
The dust from chrysotile asbestos is also harmful—especially during the manufacturing process. When airborne dust particles are inhaled, they can cause "asbestosis"; in severe cases, this condition may progress to lung cancer. However, the hazards of chrysotile asbestos dust are well known and controllable, and ongoing discussions continue to focus on how to ensure its safe use. As the renowned Chinese expert on mineral materials, Mr. Wan Pu, put it when describing chrysotile asbestos: According to... WTO and IARC1992 The research findings of the year provide the strongest evidence that non-durable fibers—including chrysotile asbestos—are no longer carcinogenic once they have been partially dissolved in the body, even though they still retain their fibrous morphology. Meanwhile, chrysotile asbestos from different ore deposits exhibits variations in its microscopic crystal chemistry and physicochemical properties, as well as in the mineralogical composition and cleavage characteristics of its fiber bundles, due to differences in their formation conditions. Consequently, the severity of their carcinogenic potential and their material performance also differ. Therefore, further research into the applied mineralogy of chrysotile asbestos is essential, and continued in-depth studies on fibrous minerals are highly recommended. / The physicochemical effects on cells are also highly valuable for the future prospects of chrysotile asbestos industry.
Swedish Toxicology Consultant David Bernstein The doctor wrote as follows: : Epidemiological and toxicological studies in animals have established an association between asbestos and certain diseases. However, chrysotile asbestos (referring to white asbestos) differs significantly from other amphibole asbestos types—such as tremolite asbestos, crocidolite, or actinolite—in terms of both chemical and mineralogical characteristics. Studies suggest that fibrous chrysotile is unlikely to possess the same properties as amphibole asbestos and may be cleared from the lungs more rapidly.
The advent of automobiles has brought numerous conveniences to people, yet the severe exhaust emissions from cars have caused environmental pollution. According to statistics, China sees approximately 100,000 deaths each year due to traffic accidents—nearly one death per day on average. 300 People, faced with these staggering figures, have not announced a halt to their use. Instead, they are focusing their attention on research aimed at reducing pollution and minimizing traffic accidents to the greatest extent possible.
Proven reserves of chrysotile asbestos in China 9000 Over 10,000 tons—this represents a tremendous wealth. The General Office of the State Council issued document Guobanfa. (2001)85 In forwarding the Ministry of Natural Resources’ “Notice on Further Rectifying and Regulating the Order of Mineral Resource Management,” asbestos was listed as a mineral resource in China. 34 One of the important mineral products. Ministry of Industry and Information Technology 2014 Year 3 Moon 27 Today, a notice was issued regarding the “Access Standards for Chrysotile Asbestos Production.” The notice emphasizes that, in order to standardize the management of the chrysotile asbestos industry, safeguard people’s lives and health, protect the ecological environment, enhance the level of comprehensive resource utilization, and guide the coordinated and sustainable development of the chrysotile asbestos production sector, the “Access Standards for the Chrysotile Asbestos Industry” have been formulated in accordance with relevant laws, regulations, and industrial planning policies. This represents the first comprehensive legal framework for chrysotile asbestos production in our country. To date, no ideal substitute fiber has been able to match chrysotile asbestos—in terms of performance or cost-performance ratio—especially when it comes to fire-resistant properties in building materials. Blindly banning the use of chrysotile asbestos would not only inflict significant economic losses on the nation but also fail to address the new pollution caused by substitute fibers. Moreover, such a ban would likely give rise to even more social safety hazards and accident risks. According to data compiled by the International Asbestos Association, during the peak period of development and application of friction material substitutes, truck traffic accidents increased. 6.4 Moreover, traffic accidents involving all motor vehicles have increased. 6.2 Moreover, the use of substitutes in sealing gasket materials and asbestos-cement products has led to an increase in leaks from petrochemical equipment and fires caused by residential buildings, resulting in enormous losses to people’s lives and property.
Having learned from countless fires, the Wuhan Building Materials Design Institute introduced a production process for calcium silicate boards. Thanks to the effective curing of cement and fibers, these products exhibit excellent stability. Coupled with their highly efficient fire-retardant performance, they quickly gained market acceptance in the humid and rainy southern regions. Of course, as science and technology continue to advance, new products may emerge to replace them—this is an ongoing evolutionary process. We cannot deny the health hazards posed by chrysotile asbestos. Its primary danger lies in the inhalation of dust and short fibers during processing, which can lead to “asbestosis” when these particles lodge in the lungs. To date, no evidence has been found indicating that chrysotile asbestos poses a radiological hazard. Over 100,000 mine workers engaged in asbestos production mostly live and work in remote mountainous regions. The employees at key national mines were, throughout history, those who answered the call of the Party and the state and voluntarily went to work in asbestos mines. They are the most direct contacts with this material, and they are the ones who most urgently wish to understand the potential hazards of chrysotile asbestos and the importance of strictly enforced dust-control measures. We sincerely hope that the Party and the government will pay attention to this vulnerable group, which has made tremendous contributions to the nation throughout history. We call for the initiation of soft research projects on the extent of asbestos hazards and on the safe and responsible use of chrysotile asbestos, conducted in strict accordance with the guidelines set forth by the International Labour Organization. 162 Convention on the Safe Use of Asbestos and 172 The “Recommendations for the Safe Use of Asbestos” call for action—action that takes responsibility for the health of workers in the asbestos industry. We oppose those who, driven by certain commercial interests, wield the whip indiscriminately, ultimately only erecting obstacles for domestic asbestos mines and giving rise to opportunities for untested, potentially hazardous substitutes.
China is a developing country, and its abundant asbestos resources represent a valuable asset for our economic development. Reasonable exploration and utilization of these asbestos resources will undoubtedly play a positive role in China’s economic development. Blindly promoting bans on the use of asbestos is an irresponsible approach toward a country rich in asbestos resources.
There are still many natural resources in the world that, although they pose risks to both extractors and users, are nonetheless safely utilized for the benefit of humanity as a whole. As long as stringent controls are put in place, it is entirely possible to ensure the safe use of chrysotile asbestos. To insist on banning its use simply because of its slight risks—while ignoring the possibility of safe utilization—is a luxury that only the wealthiest nations can afford. All substances have a dual nature, including asbestos substitutes; yet human survival itself remains an absolute necessity.
Replacing one fiber with another without conducting thorough research will inevitably lead to a shift from a known, controllable hazard to an unknown one. We hope that the relevant national authorities, after gaining a deep understanding of and conducting comprehensive research on the current state of China’s chrysotile asbestos industry and the global level of development in the asbestos industry, will formulate an industrial policy that is tailored to China’s specific national conditions and clearly defines the scope of chrysotile asbestos applications. This will provide the chrysotile asbestos and related products industry with a clear direction, guiding it toward healthy development in accordance with the requirements set forth by the Ministry of Industry and Information Technology.
Previous page