When waste material left behind by coal and metal mining is exposed to air and water, it can release the metal nickel into nearby streams, ponds, and groundwater. At high concentrations, nickel is toxic to people, fish, plants, and other living things. New research conducted using the Canadian Light Source (CLS) at the University of Saskatchewan (USask) has confirmed that a common clay called kaolinite can trap some of the nickel in mine wastewa…
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