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![Default image of ORNL entry sign](/sites/default/files/styles/list_page_thumbnail/public/2023-09/default-thumbnail.jpg?h=553c93cc&itok=N_Kd1DVR)
Iron filings the materials students sprinkle on paper above a magnet to see signs of a magnetic field-can also be used to clean up groundwater contaminated with organic compounds containing chlorine. Researchers at the Department of Energy's (DOE's) Oak Ridge National Laboratory (ORNL) and the Univ...