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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 research, exposure to asbestos can cause cancer as well as other health problems.

You cannot tell if something has asbestos just simply by looking at it and you won't be able to smell or taste it. It is only found in the event that asbestos-containing products are drilled, chipped or broken.

Chrysotile

At the height of its use, chrysotile made the majority of the asbestos production. It was used in many industries including construction, insulation, and fireproofing. If workers are exposed to asbestos, they can develop mesothelioma as well as other asbestos-related diseases. Fortunately, the use this hazardous mineral has declined drastically since mesothelioma awareness started to increase in the 1960's. It is still found in many of the products we use today.

Chrysotile is safe to use in the event that you have a complete safety and handling program in place. It has been found that at the current controlled exposure levels, there isn't an undue risk to the workers who handle it. Lung cancer, lung fibrosis and mesothelioma have been strongly connected to breathing in airborne respirable fibres. This has been proven to be true for both intensity (dose) and time of exposure.

One study that studied a facility that used nearly all chrysotile as its friction materials, compared the mortality rates of this factory with national death rates. The study found that after 40 years of processing low levels of chrysotile there was no significant rise in mortality in this factory.

Chrysotile fibres are typically shorter than other forms of asbestos. They can enter the lungs, and even enter the bloodstream. This makes them much more prone to causing health effects than longer fibres.

It is very difficult for chrysotile fibers to be a threat to the air or pose any health risk when mixed with cement. Fibre cement products are extensively used all over the world particularly in structures like hospitals and schools.

Research has proven that chrysotile is less prone to cause disease than amphibole asbestos, like crocidolite and amosite. These amphibole varieties are the primary cause of mesothelioma, and other asbestos-related diseases. When cement and chrysotile mix, a durable and flexible material is created that can withstand extreme environmental hazards and weather conditions. It is also very easy to clean after use. Professionals can safely remove asbestos fibres once they have been removed.

Amosite

Asbestos is a term used to describe a class of fibrous silicate minerals which are found naturally in a variety of kinds of rock formations. It is classified into six groups that include amphibole (serpentine), tremolite (tremolite) anthophyllite (crocidolite) and anthophyllite.

Asbestos minerals are composed of long, thin fibres that range in length from extremely fine to wide and straight to curled. These fibres are found in nature as individual fibrils, or as bundles that have splaying ends, referred to as fibril matrix. Asbestos is also found in powder form (talc) or mixed with other minerals to make vermiculite or talcum powder. They are extensively used in consumer products, such as baby powder, cosmetics and face powder.

Asbestos was extensively used in the early two-thirds of the 20th century for construction of ships insulation, fireproofing, insulation and other construction materials. The majority of asbestos-related exposures in the workplace were in the air, but certain workers were also exposed to asbestos-bearing rocks and vermiculite that was contaminated. Exposures varied from industry to industry, era to and geographic location.

Most asbestos exposures that workers were exposed to was because of inhalation, but some workers were also exposed by skin contact or through eating contaminated food. Asbestos is only found in the environment due to natural weathering and degrading of products that are contaminated, such as ceiling and floor tiles cars, brakes and clutches, as well as insulation.

There is evidence to suggest that amphibole fibres from non-commercial sources could also be carcinogenic. These are fibres that do not have the tight weaved fibrils of serpentine and amphibole minerals, but instead are flexible, loose and needle-like. These fibres are found in the mountains and cliffs of several countries.

Asbestos is able to enter the environment in a variety of 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 rocks) and anthropogenic causes (disintegration of asbestos-containing wastes and disposal in landfill sites). Asbestos contamination in ground and surface waters is primarily caused by natural weathering. However it can also be caused by anthropogeny, such as through mining and milling of asbestos-containing materials demolition and dispersal and the disposal of contaminated dumping material in landfills (ATSDR 2001). Asbestos fibres that are emitted from the air are the main reason for illness among those who are exposed to it during their occupation.

Crocidolite

Inhalation exposure is the most frequent method of exposure to asbestos fibres. These fibres can enter the lung and cause serious health problems. Mesothelioma and asbestosis as well as other diseases can be caused by asbestos fibres. Exposure to asbestos fibers can occur in different ways, including contact with contaminated clothes or building materials. The dangers of exposure are more pronounced when crocidolite, a asbestos that is blue is involved. Crocidolite is smaller and more fragile fibers that are easy to breathe in and may lodge deeper in lung tissue. It has been linked to more mesothelioma cases than other types of asbestos.

The six major types of asbestos are chrysotile amosite, epoxiemite, tremolite, anthophyllite and actinolite. The most common forms of asbestos are epoxiemite and chrysotile, which together make up 95% all commercial asbestos used. The other four have not been as widely utilized but they can be found in older buildings. They are less harmful than chrysotile and amosite, but they could be a risk when mixed with other asbestos minerals or when mined in close proximity to other mineral deposits, like vermiculite or talc.

Numerous studies have demonstrated that there is a link between stomach cancer and asbestos exposure. However the evidence is not conclusive. Some researchers have cited a SMR (standardized death ratio) of 1.5 (95% confidence interval: 0.7-3.6), for all asbestos workers, and others have reported an SMR of 1,24 (95% confidence interval: 0.76-2.5), for those working in mines and chrysotile mills.

IARC the International Agency for Research on Cancer has classified all types of asbestos carcinogenic. All Asbestos Law (Link.Mcmod.Cn) types can cause mesothelioma but the risks vary depending on how much exposure, what type of asbestos is involved, and the length of time that exposure lasts. IARC has stated that the best choice for individuals is to stay clear of all forms of asbestos lawsuit. If someone has been exposed to asbestos in the past and are suffering from an illness such as mesothelioma and other respiratory illnesses They should seek advice from their doctor or NHS 111.

Amphibole

Amphiboles are a collection of minerals that form prism-like or needle-like crystals. They are a type of inosilicate mineral made up of double chains of SiO4 molecules. They are a monoclinic system of crystals, however some exhibit an orthorhombic structure. The general formula of an amphibole is A0-1B2C5T8O22(OH,F)2. Double chains contain (Si, Al)O4 tetrahedrons linked together by tetrahedron rings made of six. Tetrahedrons can be separated by strips of octahedral site.

Amphibole minerals can be found in metamorphic and igneous rocks. They are typically dark-colored and hard. They are sometimes difficult to distinguish from pyroxenes due to their similar hardness and color. They also share a similar pattern of cleavage. However their chemistry allows a wide range of compositions. The different minerals within amphibole can be identified by their chemical compositions and crystal structures.

The five asbestos types in the amphibole family include chrysotile, Asbestos Law anthophyllite, amosite and crocidolite. They also include actinolite. While the most commonly used asbestos type is chrysotile; each has its own unique characteristics. The most dangerous form of asbestos lawyer, crocidolite, is composed of sharp fibers that are simple to breathe into the lung. Anthophyllite comes in a brownish-to yellowish color and is composed mostly of iron and magnesium. This variety was used to make cement and insulation materials.

Amphibole minerals can be difficult to analyze due to their complex chemical structures and numerous substitutions. Therefore, a thorough analysis of their composition requires special techniques. EDS, WDS and XRD are the most commonly used methods of identifying amphiboles. These methods are only able to provide approximate identifications. For example, these techniques are unable to distinguish between magnesio-hastingsite from magnesio-hornblende. Furthermore, these techniques do not distinguish between ferro-hornblende as well as pargasite.