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Microcrystalline silica consists of minute quartz crystals bonded together with amorphous silica. Examples include flint and chert. Amorphous silica consists of kieselgur , from the skeletons of diatoms, and vitreous silica, produced by heating and then rapid cooling of crystalline silica. Amorphous silica is less toxic than crystalline, but ...
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. Fracking uses silica. About 2.3 million individuals in the U.S. are exposed to silica at work.
Clinical and toxicological research conducted on volcanic crystalline silica has found little to no evidence of its ability to cause silicosis/pneumoconiosis-like diseases and geochemical analyses have shown that there are inherent factors in the crystalline structure which may render volcanic crystalline silica much less pathogenic than some ...
In Los Angeles County, they have become the face of an alarming outbreak of silicosis, a deadly lung disease caused by inhaling dust loaded with crystalline silica, among young workers who cut ...
The Silica Safety Coalition, an industry group that maintains that engineered stone can and should be cut safely, said the 70% fault attributed to "others" was an acknowledgment of the unsafe ...
In the months that followed, first responders and residents were exposed to a hazardous mix of asbestos, silica dust, heavy metals and other dangerous substances.
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO 2, commonly found in nature as quartz. [5] [6] In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and abundant families of materials, existing as a compound of several minerals and as a
Silicosis (also known as "grinder's disease" or Potter's rot) – crystalline silica dust; Bauxite fibrosis – bauxite; Berylliosis – beryllium; Siderosis – iron; Byssinosis – Byssinosis is caused by cotton dust inhalation and typically demonstrates a different pattern of lung abnormalities from most other pneumoconiosis. [1]