Chemical speciation of strontium, americium, and curium in high-level waste: Predictive modeling of phase partitioning during tank processing. 1997 annual progress report

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'In this research program, Pacific Northwest National Laboratory (PNNL) and Florida State University (FSU) are investigating the speciation of Sr and Am/Cm in the presence of selected organic chelating agents (ethylenediaminetetraacetic acid (EDTA), N-(2-hydroxyethyl) ethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), and iminodiacetic acid (IDA)) over ranges of hydroxide, carbonate, and ionic strength conditions present in high-level waste tanks. This fundamental understanding of chemical speciation reactions is essential to develop methodologies for removal of Sr and Am/Cm from the chelates, via competition, displacement or other reactions, without the need for the development of costly and potentially hazardous organic destruction technologies. These ... continued below

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6 pages

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Felmy, A.R. & Choppin, G.R. June 1, 1997.

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  • Felmy, A.R. Pacific Northwest National Lab., Richland, WA (US)
  • Choppin, G.R. Florida State Univ., Tallahassee, FL (US)

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Description

'In this research program, Pacific Northwest National Laboratory (PNNL) and Florida State University (FSU) are investigating the speciation of Sr and Am/Cm in the presence of selected organic chelating agents (ethylenediaminetetraacetic acid (EDTA), N-(2-hydroxyethyl) ethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), and iminodiacetic acid (IDA)) over ranges of hydroxide, carbonate, and ionic strength conditions present in high-level waste tanks. This fundamental understanding of chemical speciation reactions is essential to develop methodologies for removal of Sr and Am/Cm from the chelates, via competition, displacement or other reactions, without the need for the development of costly and potentially hazardous organic destruction technologies. These studies specifically focus on the effects of hydrolysis, carbonate concentration, ionic strength, and selected cation competition on the removal of Sr and Am/Cm from the organic chelates.'

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6 pages

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  • Other: DE00012616
  • Report No.: EMSP-54893--97
  • Grant Number: NONE
  • DOI: 10.2172/12616 | External Link
  • Office of Scientific & Technical Information Report Number: 12616
  • Archival Resource Key: ark:/67531/metadc624216

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Creation Date

  • June 1, 1997

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • June 13, 2016, 4:25 p.m.

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Felmy, A.R. & Choppin, G.R. Chemical speciation of strontium, americium, and curium in high-level waste: Predictive modeling of phase partitioning during tank processing. 1997 annual progress report, report, June 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc624216/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.