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

Technical Report · Sun Jun 01 04:00:00 EDT 1997

DOI:https://doi.org/10.2172/12616· OSTI ID:12616

Felmy, A R ^[1]; Choppin, G R ^[2]

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1. Pacific Northwest National Lab., Richland, WA (US)
2. Florida State Univ., Tallahassee, FL (US)

'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.'

• Research Organization: Florida State Univ., Tallahassee, FL (US)
• Sponsoring Organization: USDOE Office of Environmental Management (EM), Office of Science and Risk Policy
• OSTI ID: 12616
• Report Number(s): EMSP-54893--97; ON: DE00012616
• Country of Publication: United States
• Language: English

Related Subjects

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54 ENVIRONMENTAL SCIENCES
ACTINIDES
Actinides
CHEMICAL REACTIONS
CHEMICAL WASTES
Chemical Reactions
Chemical Wastes
HIGH-LEVEL RADIOACTIVE WASTES
High-Level Radioactive Wastes
PROGRESS REPORT
Progress Report
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REMEDIAL ACTION
Radioactive Materials
Radioactive Wastes
Remedial Action