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Milani SA, Zahakifar F, Faryadi M. Membrane assisted transport of thorium (IV) across bulk liquid membrane containing DEHPA as ion carrier: kinetic, mechanism and thermodynamic studies. RADIOCHIM ACTA 2022. [DOI: 10.1515/ract-2021-1143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Extraction and carrier mediated transport of thorium (IV) ions through bulk liquid membrane containing di-2-ethylhexyl phosphoric acid (DEHPA) in kerosene as metal ion carrier. The feed comprised of thorium (IV) ions solutions containing various concentrations of hydrochloric acid, while sulfuric acid solutions of different concentrations are used as a stripping agent. Various parameters about thorium (IV) ion extraction and transport were investigated: the feed solution acidity, initial metal ions aqueous solution concentration, carrier concentration and stripping agent concentration. More than 85% thorium (IV) is recovered in 960 min using 0.2 M DEHPA/kerosene as carrier and 1.5 M H2SO4 as stripping agent from the 0.0001 M HCl solution containing 50 mg L−1 thorium (IV) as feed. Assuming a consecutive, irreversible extraction and back-extraction (stripping) reactions a simple kinetic model was proposed for estimating the reaction rate constant or reaction rate coefficient under the investigated experimental conditions. The activation energy values of extraction and back-extraction reactions were calculated to be 29.94 kJ mol−1 and 20.55 kJ mol−1, respectively, which indicates that the extraction process was controlled by the mixed regime (both kinetic and diffusion), and the back-extraction process was mainly controlled by diffusion process.
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Affiliation(s)
- S. A. Milani
- Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI , P.O. Box: 14893-836 , Tehran , Iran
| | - F. Zahakifar
- Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI , P.O. Box: 14893-836 , Tehran , Iran
| | - Mohammad Faryadi
- Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI , P.O. Box: 14893-836 , Tehran , Iran
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Snow MS, Ward J, Bucher B, Cooper JT, Kinlaw M, Cárdenas E, Horkley J, Town H, Finck M, Carney K. Rapid Separation of Photofissioned Uranium Products via a Single-Pass Multiplexed Chromatographic Fission Product Separation System. Anal Chem 2021; 93:3770-3777. [PMID: 33599129 DOI: 10.1021/acs.analchem.0c04130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Current state-of-the-art fission product separations frequently involve multiple independent separation columns and sample manipulation processes; to couple these processes together, multiple evaporation and transposition steps are often required. The addition of these steps results in lengthy separation times, increased analysis costs, the potential for sample loss, and release of radioactive contamination. We report a new semiautomated method for the rapid separation of U, Zr, Mo, Ba, Sr, Te, and lanthanide fission products from irradiated uranium samples. Chemical yields for U, Zr, Ba, Sr, Te and the lanthanides from less than 3-day old uranium fission product samples are consistently greater than 90%, while those of Mo are greater than 70%. This method minimizes the use and addition of oxidation and reduction reagents that often cause issues with retention and separation. Uranium dissolution and fission product separations using this single-pass method are achievable in under 2 h, representing a significant improvement over traditional gravimetric uranium fission product separation procedures.
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Affiliation(s)
- Mathew S Snow
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Jessica Ward
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Brian Bucher
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Justin T Cooper
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Mathew Kinlaw
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Edna Cárdenas
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Jared Horkley
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Hayden Town
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Martha Finck
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
| | - Kevin Carney
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415-2805, United States
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Ramkumar J, Maiti B. Transport of Molybdenum Across a Bulk Liquid Membrane Using 8‐Hydroxy Quinoline as a Carrier. SEP SCI TECHNOL 2005. [DOI: 10.1081/ss-120027568] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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REZVANIANZADEH MOHAMMADREZA, YAMINI YADOLLAH, KHANCHI ALIREZA, ASHTARI PARVIZ, GHANNADI-MARAGHEH MOHAMMAD. Highly Selective and Efficient Membrane Transport of Molybdenum Using Di(2-Ethylhexyl) Phosphoric Acid as Carrier. SEP SCI TECHNOL 2000. [DOI: 10.1081/ss-100100628] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Solvation of thiocyanate complexes of tungsten(VI) by 5-(4-pyridyl) nonane from aqueous hydrochloric acid solutions. J Radioanal Nucl Chem 1985. [DOI: 10.1007/bf02037000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Extraction of molybdenum(VI) by 4-(5-nonyl)pyridine in benzene from aqueous mineral acid solutions containing thiocyanate ions. J Radioanal Nucl Chem 1984. [DOI: 10.1007/bf02227326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ahmad S, Mannan A, Ahmad I, Qureshi I. Radiochemical separation of 99Mo, 99mTc and 131I from irradiated uranium. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0020-708x(82)90052-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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