Technetium-99 removal from process solutions and contaminated groundwater

doi:https://doi.org/10.1080/01496399308019506

Title: Technetium-99 removal from process solutions and contaminated groundwater

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Abstract

The predominant form of technetium under oxic conditions is the pertechnetate anion (TcO{sub 4}{sup {minus}}), which is highly soluble in water and readily mobile in the environment. Technetium-99 is of particular concern because of its persistence and mobility. Various equipment decontamination and uranium recovery operations at the Portsmouth Gaseous Diffusion Plant generate a `raffinate` waste stream characterized by toxic heavy metals, high concentration of nitric acid, and low levels of radionuclides ({sup 235}U and {sup 99}Tc). Dilution and adjustment of solution pH to a value of 8.2 to 8.5 precipitates a heavy-metals-sludge and a filtrate. The removal of {sup 99}Tc from these waste streams and from contaminated groundwater can be accomplished using anionic ion-exchange resins. Batch equilibrium and packed column breakthrough and regeneration studies were performed using inorganic sorbents and organic ion-exchange resins (Dowex SRB-OH and Reillex resins). These studies were performed on actual and surrogate raw raffinates, filtrates, and surrogate groundwater samples. The experimental conditions were chosen to closely represent the actual process.

Authors:

Del Cul, G D; Bostick, W D; Trotter, D R; Osborne, P E ^[1]

Oak Ridge K-25 Site, TN (United States)

Publication Date:: 1993-01-01

Sponsoring Org.:: USDOE

OSTI Identifier:: 145149

Report Number(s):: CONF-911049-
Journal ID: SSTEDS; ISSN 0149-6395; TRN: TRN: 93:000018-031

DOE Contract Number:: AC05-84OR21400

Resource Type:: Journal Article

Journal Name:: Separation Science and Technology

Additional Journal Information:: Journal Volume: 28; Journal Issue: 1-3; Conference: 7. symposium on separation science and technology for energy applications, Knoxville, TN (United States), 20-24 Oct 1991; Other Information: PBD: Jan-Feb 1993

Country of Publication:: United States

Language:: English

Subject:: 40 CHEMISTRY; TECHNETIUM 99; MATERIALS RECOVERY; URANIUM 235; RADIOACTIVE EFFLUENTS; PROCESSING; ION EXCHANGE MATERIALS; GROUND WATER; PACKED BEDS

Citation Formats


                    Del Cul, G D, Bostick, W D, Trotter, D R, and Osborne, P E. Technetium-99 removal from process solutions and contaminated groundwater.  United States: N. p., 1993. 
        Web.  doi:10.1080/01496399308019506.

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                    Del Cul, G D, Bostick, W D, Trotter, D R, & Osborne, P E. Technetium-99 removal from process solutions and contaminated groundwater.  United States.  https://doi.org/10.1080/01496399308019506

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                    Del Cul, G D, Bostick, W D, Trotter, D R, and Osborne, P E. Fri .  
        "Technetium-99 removal from process solutions and contaminated groundwater".  United States.  https://doi.org/10.1080/01496399308019506.

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@article{osti_145149,

  title        = {Technetium-99 removal from process solutions and contaminated groundwater},

  author       = {Del Cul, G D and Bostick, W D and Trotter, D R and Osborne, P E},

  abstractNote = {The predominant form of technetium under oxic conditions is the pertechnetate anion (TcO{sub 4}{sup {minus}}), which is highly soluble in water and readily mobile in the environment. Technetium-99 is of particular concern because of its persistence and mobility. Various equipment decontamination and uranium recovery operations at the Portsmouth Gaseous Diffusion Plant generate a `raffinate` waste stream characterized by toxic heavy metals, high concentration of nitric acid, and low levels of radionuclides ({sup 235}U and {sup 99}Tc). Dilution and adjustment of solution pH to a value of 8.2 to 8.5 precipitates a heavy-metals-sludge and a filtrate. The removal of {sup 99}Tc from these waste streams and from contaminated groundwater can be accomplished using anionic ion-exchange resins. Batch equilibrium and packed column breakthrough and regeneration studies were performed using inorganic sorbents and organic ion-exchange resins (Dowex SRB-OH and Reillex resins). These studies were performed on actual and surrogate raw raffinates, filtrates, and surrogate groundwater samples. The experimental conditions were chosen to closely represent the actual process.},

  doi          = {10.1080/01496399308019506},

  url          = {https://www.osti.gov/biblio/145149},
  journal      = {Separation Science and Technology},
number       = 1-3,

  volume       = 28,

  place        = {United States},

  year         = {1993},

  month        = {1}

}

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