Groundwater leaching of neutralized and untreated acid-leached uranium-mill tailings

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Tailings neutralization was examined to determine the effect of neutralization on contaminant release. Column leaching of acid extracted uranium mill tailings from Exxon Highland Mill, Wyoming, Pathfinder Gas Hills Mill, Wyoming, and the Dawn Midnite Mill, Washington, resulted in the flushing of high concentrations of salts in the first four pore volumes of leachate, followed by a steady decrease to the original groundwater salt concentrations. Neutralization decreased the concentration of salts and radionuclides leaching from the tailings and decreased the volume of solution required to return the solution to the groundwater pH and EC. Radium-226 and uranium-238 leached quickly from ... continued below

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Pages: 16

Creation Information

Gee, G.W. (Pacific Northwest Lab., Richland, WA); Begej, C.W.; Campbell, A.C.; Sauter, N.N.; Opitz, B.E. & Sherwood, D.R. January 1, 1981.

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Description

Tailings neutralization was examined to determine the effect of neutralization on contaminant release. Column leaching of acid extracted uranium mill tailings from Exxon Highland Mill, Wyoming, Pathfinder Gas Hills Mill, Wyoming, and the Dawn Midnite Mill, Washington, resulted in the flushing of high concentrations of salts in the first four pore volumes of leachate, followed by a steady decrease to the original groundwater salt concentrations. Neutralization decreased the concentration of salts and radionuclides leaching from the tailings and decreased the volume of solution required to return the solution to the groundwater pH and EC. Radium-226 and uranium-238 leached quickly from the tailings in the initial pore volumes of both neutralized and unneutralized tailings, and then decreased significantly. 6 figures, 5 tables.

Physical Description

Pages: 16

Notes

NTIS, PC A02/MF A01.

Source

  • 4. symposium on uranium mill tailings management, Fort Collins, CO, USA, 26 Oct 1981

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  • Other: DE82003858
  • Report No.: PNL-SA-9823
  • Report No.: CONF-811049-9
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 6084938
  • Archival Resource Key: ark:/67531/metadc1113931

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1981

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • April 20, 2018, 1:51 p.m.

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Gee, G.W. (Pacific Northwest Lab., Richland, WA); Begej, C.W.; Campbell, A.C.; Sauter, N.N.; Opitz, B.E. & Sherwood, D.R. Groundwater leaching of neutralized and untreated acid-leached uranium-mill tailings, article, January 1, 1981; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1113931/: accessed April 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.