• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

The Dangers of Exposure to Asbestos

Before it was banned, asbestos was used in a myriad of commercial products. According research, exposure to asbestos can cause cancer as well as other health problems.

It is difficult to tell if something is asbestos-containing by looking at it, and you can't smell or taste it. Asbestos is only detectable when the material containing it is broken, drilled, or chipped.

Chrysotile

At its height, chrysotile comprised up 99% of the asbestos produced. It was used by many industries including construction insulation, fireproofing, as well as insulation. If workers were exposed to the toxic substance, they could develop mesothelioma as well as other asbestos related diseases. Thankfully, the use this harmful mineral has diminished dramatically since mesothelioma awareness began to increase in the 1960's. It is still found in many products we use today.

Chrysotile is safe to use with a well-thought-out safety and handling plan is put into place. It has been determined that at the current controlled exposure levels, there is no unneeded risk to the people who handle it. Lung cancer, lung fibrosis and mesothelioma were all linked to breathing airborne respirable fibres. This has been confirmed both for the intensity (dose) as well as duration of exposure.

In one study mortality rates were compared between a manufacturing facility that used a large proportion of Chrysotile for the production of friction materials and national death rates. It was discovered that, for 40 years of preparing asbestos chrysotile at a low level of exposure there was no significant extra mortality in the factory.

As opposed to other forms of asbestos, chrysotile fibers tend to be smaller. They can pass through the lungs, and then pass through the bloodstream. This makes them more likely to cause health consequences than longer fibres.

When chrysotile is mixed into cement, it is very difficult for the fibres to be airborne and pose any health risk. Fibre cement products are used in a variety of locations around the world including hospitals and schools.

Research has proven that amphibole asbestos, such as amosite, crocidolite, or crocidolite, is less likely than chrysotile in causing diseases. These amphibole types are the primary cause of mesothelioma, and other asbestos-related diseases. When chrysotile mixes with cement, it forms a tough, flexible building product that can withstand harsh conditions in the weather and other environmental hazards. It is also easy to clean after use. Professionals can safely dispose of asbestos (63.caiwik.com) fibres after they have been removed.

Amosite

Asbestos is a category of fibrous silicates found in certain types rock formations. It is divided into six groups that include amphibole (serpentine), Tremolite (tremolite) anthophyllite (crocidolite) and anthophyllite.

Asbestos minerals are composed of thin, long fibers that range in length from fine to broad. They can also be curled or straight. These fibers are found in nature in bundles or individual fibrils. Asbestos is also found in a powder form (talc), or combined with other minerals to create talcum powder or vermiculite. These are widely used as consumer goods, including baby powder, cosmetics and face powder.

Asbestos was extensively used in the early two-thirds of the 20th century to construct shipbuilding as well as insulation, fireproofing and other construction materials. Most occupational exposures were asbestos fibres in the air, however some workers were exposed to vermiculite and talc that had been contaminated as well as to fragments of asbestos-bearing rock (ATSDR 2001). Exposures varied by industry, time period and geographical location.

Most asbestos exposures at work were due to inhalation, but some workers were also exposed through skin contact or by eating food contaminated with asbestos. Asbestos is only found in the environment due to natural weathering and the degradation of contaminated products, such as ceiling and floor tiles automobile brakes and clutches, asbestos and insulation.

There is growing evidence that non-commercial amphibole fibers could also be carcinogenic. These are the fibres that don't form the tightly woven fibrils of the amphibole and serpentine minerals, but instead are loose, flexible and needle-like. These fibers are found in the mountains and cliffs of several countries.

Asbestos is able to enter the environment in many ways, such as in airborne particles. It can also be released into water or soil. This is a result of both natural (weathering and erosion of asbestos-bearing rocks) and ananthropogenic (disintegration and removal of asbestos-containing wastes from landfill sites) sources. asbestos lawsuit contamination of ground and surface water is mostly a result of natural weathering, however it has also been caused by human activities like milling and mining demolition and dispersal asbestos-containing materials, and the removal of contaminated dumping soils in landfills (ATSDR, 2001). Airborne asbestos fibres are the primary cause of illness among people exposed to asbestos in their occupation.

Crocidolite

Exposure to asbestos through inhalation is the most frequent method by which people are exposed harmful fibres. They can then be inhaled and cause serious health problems. This includes asbestosis and mesothelioma. The exposure to asbestos fibres could be experienced in other ways, such as contact with contaminated clothing or asbestos building materials. The risks of exposure are heightened when crocidolite which is the asbestos in the blue form, is involved. Crocidolite fibers are smaller and more fragile, making them easier to breathe in. They also can get deeper within lung tissue. It has been linked to more mesothelioma cases than other asbestos case types.

The main types are chrysotile as well as amosite. The most common asbestos types are epoxiemite and chrysotile which together make up 95% all commercial asbestos used. The other four types haven't been as extensively used but they can be found in older buildings. They are not as hazardous as amosite and chrysotile, 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 shown the connection between stomach cancer and asbestos exposure. The evidence isn't conclusive. Certain researchers have cited an 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 chrysotile mills and mines.

The International Agency for Research on Cancer (IARC) has classified all asbestos types as carcinogenic. All kinds of asbestos can cause mesothelioma as well as other health problems, but the risk is dependent on the amount of exposure people are exposed to, the kind of asbestos involved as well as the duration of exposure and the manner in the way that it is breathed in or ingested. IARC has stated that the best choice for people is to avoid all forms of asbestos. However, if someone has been exposed to asbestos in the past and suffer from an illness such as mesothelioma and other respiratory conditions They should seek advice from their GP or NHS 111.

Amphibole

Amphibole is a group of minerals that form long prism or needlelike crystals. They are an inosilicate mineral that is composed of two chains of SiO4 molecules. They have a monoclinic structure of crystals, however certain crystals have an orthorhombic form. The general formula of an amphibole is A0-1B2C5T8O22(OH,F)2. The double chains consist of (Si,Al)O4 Tetrahedrons that are joined in rings of six. The tetrahedrons are separated each other with octahedral strips.

Amphiboles are present in metamorphic and igneous rock. They are usually dark and hard. They can be difficult to distinguish from pyroxenes due to their similar hardness and color. They also share a corresponding pattern of cleavage. However, their chemistry allows for the use of a variety of compositions. The chemical compositions and crystal structures of the different mineral groups in amphibole can be used to determine their composition.

Amphibole asbestos is comprised of chrysotile as well as the five types of asbestos amosite anthophyllite (crocidolite), amosite (actinolite) and amosite. Each kind of asbestos has its own unique properties. Crocidolite is the most dangerous asbestos kind. It has sharp fibers which are easily breathed into the lung. Anthophyllite can be found in a brownish or yellowish color and is composed primarily of magnesium and iron. It was previously used in products such as cement and insulation materials.

Amphibole minerals are hard to analyze due to their an intricate chemical structure and numerous substitutions. Therefore, a detailed analysis of their composition requires specialized methods. The most popular methods of identifying amphiboles include EDS, WDS, and XRD. However, these methods can only give approximate identifications. For instance, these techniques cannot distinguish between magnesiohastingsite and magnesio-hornblende. These techniques also don't differentiate between ferro-hornblende or pargasite.