Colloid facilitated transport in fractured rock : parameter estimation and comparison with experimental data

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Many contaminants in groundwater strongly interact with the immobile porous matrix, which retards their movement relative to groundwater flow. Colloidal particles, which are often present in groundwater, have a relatively small size and large specific surface area which makes it possible for them to also adsorb pollutants. The sorption of tracers to colloids may enhance their mobility in groundwater, relative to the case where colloids are not present. A class of pollutants for which colloid-facilitated transport may be of particular significance are radioactive isotopes. A major reason for why geologic repositories are considered suitable for the disposal of spent nuclear ... continued below

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5 p.

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Viswanathan, H. S. (Hari Selvi) & Wolfsberg, A. V. (Andrew V.) January 1, 2002.

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Many contaminants in groundwater strongly interact with the immobile porous matrix, which retards their movement relative to groundwater flow. Colloidal particles, which are often present in groundwater, have a relatively small size and large specific surface area which makes it possible for them to also adsorb pollutants. The sorption of tracers to colloids may enhance their mobility in groundwater, relative to the case where colloids are not present. A class of pollutants for which colloid-facilitated transport may be of particular significance are radioactive isotopes. A major reason for why geologic repositories are considered suitable for the disposal of spent nuclear fuel is the strong affinity of many radionuclides to adsorb onto the porous matrix. Therefore, radionuclides accidentally released, would be contained in the geological media by adsorption or filtration until sufficient decay takes place. However, the presence of colloids may enhance radionuclide mobility in the groundwater, and reduce the efficiency of geologic media to act as a natural barrier.

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5 p.

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  • Submitted to: 2003 International High-Level Radioactive Waste Management Conference

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  • Report No.: LA-UR-02-5852
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976348
  • Archival Resource Key: ark:/67531/metadc927169

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

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  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 10:57 p.m.

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Viswanathan, H. S. (Hari Selvi) & Wolfsberg, A. V. (Andrew V.). Colloid facilitated transport in fractured rock : parameter estimation and comparison with experimental data, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc927169/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.