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WWRC 95-20
Detecting Selenium in Groundwater


Introduction Although selenium (Se) is an essential element, excessive selenium is toxic to animals and humans. The mandated limit in drinking water is 0.01 mg/l. University of Wyoming researchers have discovered that copper oxide selectively absorbs dissolved selenium, and have used this property to devise a new quantitative test for SeO32- and SeO42- in alkaline groundwater.

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