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The Dangers of Exposure to Asbestos
Before it was banned asbestos was used in a myriad of commercial products. According to studies, exposure to asbestos can cause cancer and a host of other health problems.
It is impossible to tell just by taking a look at something if it contains asbestos. It is also impossible to taste or smell it. It is only found when asbestos-containing materials are chipped, drilled or broken.
Chrysotile
At its height, chrysotile provided for 90% of the asbestos that was produced. It was employed in many industries such as construction insulation, fireproofing, and construction. If workers are exposed to asbestos, they may develop mesothelioma or other asbestos-related diseases. Fortunately, the use this harmful mineral has diminished dramatically since mesothelioma awareness began to grow in the 1960's. It is still found in many of the products we use today.
Chrysotile can be used safely when a thorough safety and handling plan is put in place. Personnel handling chrysotile aren't exposed to a significant amount of risk based on the current limits of exposure. The inhalation of airborne fibres has been linked with lung fibrosis and lung cancer. This has been proven to be true for both intensity (dose) and duration of exposure.
In one study, mortality rates were compared between a facility that primarily used Chrysotile in the production of friction materials and the national death rate. It was found that over the course of 40 years, processing chrysotile asbestos at low levels of exposure, there was no significant extra mortality in the factory.
Unlike some other forms of asbestos, chrysotile fibres tend to be shorter. They can enter the lungs and enter the bloodstream. This makes them more prone to causing health effects than fibrils with a longer length.
When chrysotile mixes with cement, it is extremely difficult for the fibres to become airborne and pose any health risks. Fibre cement products are used in various parts of the world including hospitals and schools.
Research has revealed that amphibole asbestos, such as crocidolite or amosite is less likely to cause disease. Amphibole asbestos types have been the primary cause of mesothelioma and other asbestos-related diseases. When cement and chrysotile mix, a durable, flexible product is created which is able to withstand the most extreme weather conditions and environmental hazards. It is also very easy to clean after use. Professionals can safely remove asbestos fibres once they have been removed.
Amosite
Asbestos is a category of silicate fibrous minerals which are found naturally in a variety of kinds of rock formations. It consists of six general groups: amphibole, serpentine as well as tremolite, anthophyllite, and crocidolite (IARC 1973).
Asbestos minerals consist of thin, long fibers that vary in length from fine to wide. They can be curled or straight. These fibres can be found in nature in bundles or individual fibrils. Asbestos can also be found in powder form (talc) or combined with other minerals in order to create talcum powder or vermiculite. They are extensively used in consumer products, including baby powder, cosmetics, and face powder.
The heaviest asbestos use was during the first two-thirds period of the twentieth century, when it was used in shipbuilding, insulation, fireproofing, and other construction materials. The majority of asbestos exposures for work were in the air, however some workers were also exposed to asbestos-bearing rock fragments and contaminated vermiculite. Exposures varied from industry industry, era to and also from geographical location.
Most asbestos-related exposures in the workplace were due to inhalation, but some workers were also exposed via skin contact or by eating food contaminated with asbestos. Asbestos is only present in the environment due to natural weathering of mined ores and the deterioration of products contaminated with asbestos like insulation, car brakes, clutches, as well as floor and ceiling tiles.
There is emerging evidence that non-commercial amphibole fibres may also be carcinogenic. These are fibers that don't form the tightly weaved fibrils of amphibole or serpentine minerals but instead are loose, flexible and needle-like. These fibres can be found in cliffs, mountains and sandstones of a variety of countries.
Asbestos can be absorbed into the environment in many ways, including as airborne particles. It can also leach out into soil or water. This can be triggered by both natural (weathering of asbestos-bearing rock) and anthropogenic causes (disintegration of asbestos-containing wastes and disposal in landfill sites). Asbestos contamination of surface and ground water is typically a result of natural weathering, but has also been caused by anthropogenic activities such as mining and milling demolition and dispersal asbestos-containing materials as well as the disposal of contaminated dumping ground in landfills (ATSDR, 2001). Asbestos fibres that are emitted from the air are the most significant cause of disease among those exposed to asbestos during their job.
Crocidolite
Exposure to asbestos through inhalation is the most frequent way people are exposed to harmful fibres that can then be inhaled and cause serious health problems. Mesothelioma as well as asbestosis and other diseases are caused by asbestos fibres. The exposure to asbestos can happen in different ways too like contact with contaminated clothing or building materials. The risks of exposure are more pronounced when crocidolite, the asbestos that is blue is involved. Crocidolite fibers are thinner and more fragile which makes them more difficult to inhale. They can also be lodged deeper within lung tissue. It has been associated with a higher number of mesothelioma-related cancers than any other type of asbestos.
The six major types are chrysotile and amosite. The most commonly used forms of asbestos are epoxiemite as well as chrysotile which together comprise 95% all commercial asbestos used. The other four have not been as widely used however, they could be found in older buildings. They are less hazardous than amosite and chrysotile, but they could pose a threat when mixed with other asbestos minerals or when mined close to other mineral deposits, such as talc or vermiculite.
Several studies have found an connection between asbestos exposure and stomach cancer. Numerous studies have shown a link between asbestos exposure and stomach. However, the evidence is contradictory. Some researchers have reported an SMR (standardized mortality ratio) of 1.5 (95 percent of the time CI: 0.7-3.6) for all workers exposed to asbestos, while others have reported an SMR of 1.24 (95 percent of the CI = 0.76-2.5) for those who work in chrysotile mines and mills.
IARC the International Agency for Research on Cancer, has classified all forms of asbestos carcinogenic. fort myers asbestos attorney of asbestos can cause mesothelioma and other health issues, however the risks are different based on the amount of exposure that people are exposed to, the kind of asbestos used, the duration of their exposure, and the manner in the way that it is breathed in or ingested. The IARC has advised that avoiding all forms of asbestos should be the highest priority because this is the safest option for individuals. However, if a person has been exposed to asbestos in the past and are suffering from a condition such as mesothelioma or other respiratory diseases They should seek advice from their physician or NHS 111.
Amphibole
Amphibole is one of the minerals that form long prism or needle-like crystals. They are a type of silicate mineral made up of double chains of SiO4 molecules. They typically possess a monoclinic crystal system, although some have an orthorhombic structure. The general formula of an amphibole is A0-1B2C5T8O22(OH,F)2. The double chains consist of (Si,Al)O4 Tetrahedrons, which are connected in rings of six. The tetrahedrons can be separated by octahedral strips.
Amphiboles are found in both igneous and metamorphic rock. They are usually dark-colored and are hard. They can be difficult to distinguish from pyroxenes since they share similar hardness and colors. They also share a similar pattern of cleavage. Their chemistry can allow for a variety of compositions. The various amphibole mineral groups are identified by their chemical compositions and crystal structures.
Amphibole asbestos includes chrysotile and the five asbestos types amosite, anthophyllite (crocidolite), amosite (actinolite), and amosite. Each type of asbestos comes with its own distinct properties. Crocidolite is considered to be the most hazardous asbestos kind. It contains sharp fibers that can be easily breathed into the lungs. Anthophyllite ranges from brown to yellowish in color and is made up of iron and magnesium. This kind of material was used to create cement and insulation materials.
Amphiboles can be difficult to study due to their complex chemical structure and numerous substitutions. Therefore, a detailed analysis of their composition requires special techniques. EDS, WDS and XRD are the most widely used methods for identifying amphiboles. However, these methods can only give approximate identifications. For example, these techniques can't distinguish between magnesio hastingsite and magnesio-hornblende. In addition, these techniques can not distinguish between ferro-hornblende or pargasite.