Removal of technetium, carbon tetrachloride, and metals from DOE properties. 1998 annual progress report

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'The objective of the project is to develop and characterize supported reducing agents, and solid waste forms derived from them, which will be effective in the removal of transition metal ions, chlorinated organic molecules, and technetium from aqueous mixed wastes. This work follows the discovery that a nanoscale form of zero-valent iron, dispersed on high surface area supports, reduces metal ions (chromium, mercury, and lead) and rhenium (as a surrogate for technetium) to insoluble forms much faster than does unsupported iron. The scientific goals of the project are to better understand the mechanism of the reduction process, to develop supports ... continued below

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4 pages

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Mallouk, T.E.; Darab, J.G. & Ponder, S.M. June 1, 1998.

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  • Pennsylvania State University
    Publisher Info: Pennsylvania State Univ., University Park, PA (United States)
    Place of Publication: University Park, Pennsylvania

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Description

'The objective of the project is to develop and characterize supported reducing agents, and solid waste forms derived from them, which will be effective in the removal of transition metal ions, chlorinated organic molecules, and technetium from aqueous mixed wastes. This work follows the discovery that a nanoscale form of zero-valent iron, dispersed on high surface area supports, reduces metal ions (chromium, mercury, and lead) and rhenium (as a surrogate for technetium) to insoluble forms much faster than does unsupported iron. The scientific goals of the project are to better understand the mechanism of the reduction process, to develop supports that are compatible with a variety of mixed waste compositions, and to develop surface modifiers for the supported iron aggregates that will optimize their selectivity for the contaminants of interest. The support composition is of particular interest in the case of technetium (Tc) separation and stabilization in the Hanford tank wastes. While it is expected that pertechnetate will be reduced insoluble TcO{sub 2} , the support material must be compatible with the vitrification process used in the final waste disposition. The surface modifications are also a focal point for Hanford applications because of the complex and variable makeup of the tank wastes. This report summarizes progress in the first 8 months of a 3-year collaborative project involving Penn State and Pacific Northwest National Laboratory (PNNL).'

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4 pages

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  • Other: DE00013750
  • Report No.: EMSP-60017--98
  • Grant Number: NONE
  • DOI: 10.2172/13750 | External Link
  • Office of Scientific & Technical Information Report Number: 13750
  • Archival Resource Key: ark:/67531/metadc626359

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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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  • June 1, 1998

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 20, 2017, 1:18 p.m.

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Mallouk, T.E.; Darab, J.G. & Ponder, S.M. Removal of technetium, carbon tetrachloride, and metals from DOE properties. 1998 annual progress report, report, June 1, 1998; University Park, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc626359/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.