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Beryllium poisoning is poisoning by the toxic effects of beryllium, or more usually its compounds. It takes two forms: Acute beryllium poisoning, usually as a result of exposure to soluble beryllium salts; Chronic beryllium disease (CBD) or berylliosis, usually as a result of long-term exposure to beryllium oxide usually caused by inhalation.
Acute beryllium poisoning is an occupational disease. [1] Relevant occupations are those where beryllium is mined, processed or converted into metal alloys, or where machining of metals containing beryllium or recycling of scrap alloys occurs.
Berylliosis, or chronic beryllium disease (CBD), is a chronic allergic-type lung response and chronic lung disease caused by exposure to beryllium and its compounds, a form of beryllium poisoning. It is distinct from acute beryllium poisoning , which became rare following occupational exposure limits established around 1950. [ 1 ]
Because beryllium is expensive (many times more than titanium), hard to shape due to its brittleness, and toxic if mishandled, beryllium tweeters are limited to high-end home, [119] [120] [121] pro audio, and public address applications. [122] [123] Some high-fidelity products have been fraudulently claimed to be made of the material. [124]
Beryllium poisoning is attributed to the ability of Be 2+ to replace Mg 2+ in some enzymes. [22] Be has been classified by one agency as a carcinogen. [23] Cadmium poisoning came into focus with the discovery of the Itai-itai disease due to cadmium contaminated waters resulting from mining in the Toyama Prefecture starting around 1912. [24]
To the peasant farmers, the campesinos, the cause of the contamination is evident. The hills contain flecks of gold ore, one of the rarest minerals on Earth. And for 22 years, the American company Newmont Mining Corp., with financing from the business-lending arm of the World Bank, has blasted apart hills and used toxic chemicals to get it out.
Beryl (/ ˈ b ɛr əl / BERR-əl) is a mineral composed of beryllium aluminium silicate with the chemical formula Be 3 Al 2 Si 6 O 18. [6] Well-known varieties of beryl include emerald and aquamarine. Naturally occurring hexagonal crystals of beryl can be up to several meters in size, but terminated crystals are relatively rare. Pure beryl is ...
Beryllium copper (BeCu), also known as copper beryllium (CuBe), beryllium bronze, and spring copper, is a copper alloy with 0.5–3% beryllium. [1] Copper beryllium alloys are often used because of their high strength and good conductivity of both heat and electricity. [2] It is used for its ductility, weldability in metalworking, and machining ...