![]() The main ores of cobalt are cobaltite, erythrite, glaucodot, and skutterudite. Cobalt is usually not mined alone, and tends to be produced as a by-product of nickel and copper mining activities. Cobalt is not found as a free metal and is generally found in the form of ores. In the marine environment cobalt is needed by blue-green algae (cyanobacteria) and other nitrogen fixing organisms. Cobalt is of relatively low abundance in the Earth's crust and in natural waters, from which it is precipitated as the highly insoluble cobalt sulfine CoS.Īlthough the average level of cobalt in soils is 8 ppm, there are soils with as little as 0.1 ppm and others with as much as 70 ppm. Most of the Earth's cobalt is in its core. The radioactive isotopes, cobalt-60, is used in medical treatment and also to irradiate food, in order to preserve the food and protect the consumer. Cobalt blue is an important part of artists' palette and is used bu craft workers in porcelain, pottery, stained glass, tiles and enamel jewellery. Cobalt is stable in air and unaffected by water, but is slowly attacked by dilute acids.Ĭobalt is used in many alloys (superalloys for parts in gas turbine aircrafr engines, corrosion resistant alloys, high-speed steels, cemented carbides), in magents and magnetic recording media, as catalysts for the petroleum and chemical industries, as drying agents for paints and inks. The element is active chemically, forming many compounds. It is similar to iron and nickel in its physical properties. It is a member of group VIII of the periodic table. 0.28 V ( Co 2+/ Co ) +1.84 V ( Co 3+/ Co 2+ )Ĭobalt is a hard ferromagnetic, silver-white, hard, lustrous, brittle element. ![]() Separation and Concentration Purification RequestĬobalt - Co Chemical properties of cobalt - Health effects of cobalt - Environmental effects of cobalt.Plant Inspection & Process Optimalisation.
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