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U.S. Bureau of Mines final report: Midnite Mine water treatment studies.
Schultze-LE; Nilsen-DN; Isaacson-AE; Lahoda-EJ
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9605, 1996 Jan; :1-58
The U.S. Bureau of Mines reviewed and evaluated options for treatment of the approximately 500 millions gallons of contaminated water in flooded pits at the Midnite Mine on the Spokane Indian Reservation. While current lime treatment produces discharge quality water, the resultant sludges are radioactive, presenting a disposal problem. Of the 24 commercial processes and seven emerging technologies evaluated, none demonstrated a significant advantage over ion exchange using a strong base anion exchange resin in either laboratory or field tests. Uranium was lowered by 22 ppm to 0.2 ppb in treated water. Radium was lowered from 44 pCi/L to <1 pCi/L using a modified precipitation with BaCl2. The natural zeolite, clinoptilotite, lowered radium to 6-8 pCi/L when used as an ion exchanger.
Absorption; Cost-estimates; Field-tests; Ion-exchange; Laboratory-tests; Neutralization; Precipitation-Chemistry; Radium; Sludges; Waste-treatment; Chemical-reactions; Exposure-levels
Report of Investigations
NTIS Accession No.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9605
Westinghouse Electric Corporation, Pittsburgh, PA. Science and Technology Center
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division