Yttrium
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Yttrium is a silvery white lustrous metal.[1] In the Periodic Table, its symbol is Y and its atomic number is 39. It was discovered in Sweden in 1794.[2] Yttrium is found in most rare-earth minerals and in moon rocks.[3]
Contents
Uses
Yttrium oxide is used to produce the red color in color television tubes and to produce yttrium-iron-garnets, which are used as microwave filters.[4] Yttrium can also be used in laser systems, as a catalyst for ethylene polymerization reactions, and as a gemstone.[5]
In the Environment
In Sewage Sludge
In the Targeted National Sewage Sludge Survey, a 2009 test of 84 samples of sewage sludge from around the U.S., the EPA found yttrium in every sample in concentrations ranging from 0.70 to 26.3 parts per million.[6]
Articles and resources
Related SourceWatch articles
References
- ↑ WebElements: Yttrium, Accessed August 31, 2010.
- ↑ Yttrium, Accessed August 31, 2010.
- ↑ WebElements: Yttrium, Accessed August 31, 2010.
- ↑ Yttrium, Accessed August 31, 2010.
- ↑ Yttrium, Accessed August 31, 2010.
- ↑ Targeted National Sewage Sludge Survey Report, US EPA website, Accessed August 28, 2010.
External resources
External articles
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