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Workers in a cloud of concrete dust containing respirable crystalline silica with no controls in place. Silicosis is the most common occupational lung disease worldwide. It occurs everywhere, but is especially common in developing countries. [32] From 1991 to 1995, China reported more than 24,000 deaths due to silicosis each year. [13]
It is used to make items like glass, stoneware, earthenware, blocks, and manufactured stone. Respirable crystalline silica – microscopic particles of silica can be become airborne and inhaled when cutting, sawing, grinding, or drilling rock or concrete. Silica is used for foundry molds and cores, so exposure can occur when grinding on castings.
Pneumoconiosis is the general term for a class of interstitial lung disease where inhalation of dust (for example, ash dust, lead particles, pollen grains etc) has caused interstitial fibrosis. [ 1 ] [ 2 ] The three most common types are asbestosis , silicosis , and coal miner's lung . [ 3 ]
The increased drilling generates deadly silica dust and has caused severe forms of pneumoconiosis, better known as black lung disease, even among younger miners, some in their 30s and 40s.
The black lung problem has only grown in recent years as miners dig through more layers of rock to get to less accessible coal, generating deadly silica dust in the process. Silica dust is 20 ...
Respirable dust is sampled using a cyclone dust sampler design to sample for a specific fraction of dust AED at a set flow rate. The respirable dust fraction is dust that enters the 'deep lung' and is considered to be less than 10 micrometers AED. [citation needed] Nuisance, inhalable and respirable dust fractions are all sampled using a ...
Although it has been defined as an extension of pneumoconiosis, there is no scientific evidence for a similar disease related to volcanic silica particle exposures. [ 8 ] Subsequently, the word was used in Frank Scully 's puzzle book Bedside Manna , after which time, members of the N.P.L. campaigned to include the word in major dictionaries.
Dust less than 10 microns in size cannot be seen with the eye. In non-coal mining, stone, and sand and gravel mining operations and for particular occupations in coal mines, the respirable silica dust created during mining is the primary concern. [11] Respirable dust can cause long-term lung problems.
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