Yttrium is a silvery white lustrous metal. In the Periodic Table, its symbol is Y and its atomic number is 39. It was discovered in Sweden in 1794. Yttrium is found in most rare-earth minerals and in moon rocks.
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. Yttrium can also be used in laser systems, as a catalyst for ethylene polymerization reactions, and as a gemstone.
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.
Articles and resources
Related SourceWatch articles
|This article is a stub. You can help by expanding it.|