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Silica ingested orally is essentially nontoxic, with an LD 50 of 5000 mg/kg (5 g/kg). [22] A 2008 study following subjects for 15 years found that higher levels of silica in water appeared to decrease the risk of dementia. An increase of 10 mg/day of silica in drinking water was associated with a reduced risk of dementia of 11%. [70]
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.
There is scientific speculation that exposure to various toxic products and the pollutants in the air surrounding the Towers after the WTC collapse may have negative effects on fetal development. Due to this potential hazard, a notable children's environmental health center (Columbia University Center for Children's Health) is currently ...
The new study estimated that 100,000 workers in the U.S. are potentially at risk of silicosis due to exposure to silica dust. ... that apply water to the blade to prevent dust from flying into the ...
A toxic injury is a type of injury resulting from exposure to a toxin.Toxic injuries can manifest as teratogenic effects, respiratory effects, gastrointestinal effects, cardiovascular effects, hepatic effects, renal effects, neurological effects, or a combination thereof.
These have been mandated by legislation, such as The Pottery (Health and Welfare) Special Regulations 1950. [29] [30] The Health and Safety Executive in the UK has produced guidelines on controlling exposure to respirable crystalline silica in potteries, and the British Ceramics Federation provide, as a free download, a guidance booklet.
The use of personal protective equipment may substantially reduce the risk of adverse health effects from contact with hazardous materials. [2] Long-term exposure to chemical hazards such as silica dust, engine exhausts, tobacco smoke, and lead (among others) have been shown to increase risk of heart disease, stroke, and high blood pressure. [3]
Exposure to these substances can result in health effects such as skin irritation, respiratory problems, organ damage, neurological effects, and cancer. [4] Physical hazards are factors within the environment that can harm the body without necessarily touching it. They include a wide range of environmental factors such as noise, vibration ...