crystalline silica वाक्य
उदाहरण वाक्य
मोबाइल
- For example in mining process currently in Mozambique, an annular fluidised beds are used to preheat and reduce ilmenite ore, ilmenite is hazardous compound as crystalline silica is known to cause lung fibrosis and is a known carcinogen.
- General symptoms are shortness of breath, productive or nonproductive cough, fatigue, and occasionally respiratory failure . ccelerated silicosis has similar symptoms as chronic silicosis, however it develops rapidly in 5 10 years of high exposure to respirable crystalline silica.
- Substances that are designated hazardous, such as asbestos or crystalline silica, are often said to be friable if small particles are easily dislodged and become airborne, and hence respirable ( able to enter human lungs ), posing a health hazard.
- Guideline values have been created for exposure, but with unclear rationale; UK guidelines for particulates in air ( PM10 ) are 50 �g / m 3 and USA guidelines for exposure to crystalline silica are 50 �g / m 3.
- In 1996, the International Agency for Research on Cancer ( IARC ) reviewed the medical data and classified crystalline silica as " carcinogenic to humans . " The risk was best seen in cases with underlying silicosis, with relative risks for lung cancer of 2-4.
- The exposure levels to free crystalline silica in the ash are commonly used to characterise the risk of silicosis in occupational studies ( for people who work in mining, construction and other industries, ) because it is classified as a human carcinogen by the International Agency for Research on Cancer.
- In this study, 31 % of the samples indicated levels at least ten times the REL . N IOSH studied the levels of exposure at different parts of the fracturing process and found seven primary areas of high respirable crystalline silica exposure with transfer belts and sand movers as the highest.
- In general, the composition of the residue reflects that of the non-aluminium components, with the exception of part of the silicon component : crystalline silica ( quartz ) will not react but some of the silica present, often termed, reactive silica, will react under the extraction conditions and form sodium aluminium silicate.
- :If the questioner goes to his neighborhood building center or hardware store and asks for " sand " for his child's sandbox, he is likely to get " play sand . " This product has a Material Safety data Sheet which says it is made of " crystalline silica, " which seems to be another name for silicon dioxide.
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