Coextraction behavior of Tc(VII) and U(VI) by CMPO

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Solvent Extraction and Ion Exchange; (United States)

DOI:https://doi.org/10.1080/07366299508918260· OSTI ID:6799713

Takeuchi, Mitsuo; Tanaka, Satoru; Yamawaki, Michio ^[1]; Tachimori, Shoichi ^[2]

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1. Univ. of Tokyo, Ibaraki (Japan)
2. Japan Atomic Energy Research Inst., Ibaraki (Japan)

The coextraction behavior of technetium(VII) and uranium(VI) from nitric acid solution by n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) in the absence or presence of tributyl phosphate (TBP) was investigated. The extraction of technetium was remarkably enhanced in the presence of uranium at less than 0.1M nitric acid concentration, and with the initial concentration ratio of [U]/[Tc] = 50 in the aqueous phase, the distribution coefficient of Tc(VII) at 0.01M nitric acid was about one hundred times greater than that obtained in the absence of uranium. The coextraction of technetium and uranium was presumed to occur due to the same ion exchange mechanism as reported in the Tc-U-TBP system. However, the effect of TBP on this coextraction was not observed in the present study. 17 refs., 8 figs.

• OSTI ID: 6799713
• Journal Information: Solvent Extraction and Ion Exchange; (United States), Journal Name: Solvent Extraction and Ion Exchange; (United States) Vol. 13:1; ISSN 0736-6299; ISSN SEIEDB
• Country of Publication: United States
• Language: English

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ACTINIDES
BUTYL PHOSPHATES
CMPO
DISTRIBUTION
ELEMENTS
ESTERS
EXTRACTION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MANAGEMENT
MASS DISTRIBUTION
METALS
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHINE OXIDES
PHOSPHINES
PHOSPHORIC ACID ESTERS
PHOSPHORUS COMPOUNDS
PROCESSING
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPATIAL DISTRIBUTION
TBP
TECHNETIUM
TRANSITION ELEMENTS
URANIUM
WASTE MANAGEMENT
WASTE PROCESSING