Hydrogen anode for nitrate waste destruction. Revision 2

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Large quantities of radioactive and hazardous wastes have been generated from nuclear materials production during the past fifty years. Processes are under evaluation to separate the high level radioactive species from the waste and store them permanently in the form of durable solids. The schemes proposed will separate the high level radioactive components, cesium-137 and strontium-90, into a small volume for incorporation into a glass wasteform. The remaining low-level radioactive waste contain species such as nitrites and nitrates that are capable of contaminating ground water. Electrochemical destruction of the nitrate and nitrite before permanent storage has been proposed. Not only ... continued below

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24 p.

Creation Information

Hobbs, D.T.; Kalu, E.E. & White, R.E. February 10, 1996.

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  • Hobbs, D.T. Westinghouse Savannah River Co., Aiken, SC (United States)
  • Kalu, E.E.
  • White, R.E. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering

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Description

Large quantities of radioactive and hazardous wastes have been generated from nuclear materials production during the past fifty years. Processes are under evaluation to separate the high level radioactive species from the waste and store them permanently in the form of durable solids. The schemes proposed will separate the high level radioactive components, cesium-137 and strontium-90, into a small volume for incorporation into a glass wasteform. The remaining low-level radioactive waste contain species such as nitrites and nitrates that are capable of contaminating ground water. Electrochemical destruction of the nitrate and nitrite before permanent storage has been proposed. Not only will the electrochemical processing destroy these species, the volume of the waste could also be reduced. The use of a hydrogen gas-fed anode and an acid anolyte in an electrochemical cell used to destroy nitrate was demonstrated. A mixed Na{sub 2}SO{sub 4}/H{sub 2}SO{sub 4} anolyte was shown to favor the nitrate cell performance, and the generation of a higher hydroxide ion concentration in the catholyte. The suggested scheme is an apparent method of sodium sulfate disposal and a possible means through which ammonia (to ammonium sulfate, fertilizer) and hydrogen gas could be recycled through the anode side of the reactor. This could result in a substantial savings in the operation of a nitrate destruction cell.

Physical Description

24 p.

Notes

INIS; OSTI as DE97000431

Source

  • Other Information: PBD: 10 Feb 1996

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Identifier

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  • Other: DE97000431
  • Report No.: WSRC-MS--95-0193-Rev.2
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/392770 | External Link
  • Office of Scientific & Technical Information Report Number: 392770
  • Archival Resource Key: ark:/67531/metadc679523

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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.

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Creation Date

  • February 10, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 9, 2016, 8:51 p.m.

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Hobbs, D.T.; Kalu, E.E. & White, R.E. Hydrogen anode for nitrate waste destruction. Revision 2, report, February 10, 1996; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc679523/: accessed May 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.