Separation of Radium and Barium by Ion Exchange Elution

Power, W. H.; Kirby, H. W.; McCluggage, W. C.; Nelson, Grant S.; Payne, John H.

doi:10.1021/ac60150a002

Cited by 17 publications

(3 citation statements)

References 5 publications

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“…For the radium/barium separation, a method by Power et al . was adapted as described below 31 . Fraction 6–8 from each of the reiterations were brought to dryness, reconstituted in 5 mL 0.1 M HNO 3 and then passed through cation columns containing 1 mL (0.8 cm inner diameter), 2 mL (0.8 cm inner diameter), or 3 mL (0.8 cm inner diameter) of AG 50WX8 resin, 200–400 mesh, and the effluent was collected, fraction 14 (5 mL).…”

Section: Methodsmentioning

confidence: 99%

Simultaneous Separation of Actinium and Radium Isotopes from a Proton Irradiated Thorium Matrix

Mastren

Radchenko

Owens

et al. 2017

Sci Rep

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A new method has been developed for the isolation of 223,224,225Ra, in high yield and purity, from a proton irradiated 232Th matrix. Herein we report an all-aqueous process using multiple solid-supported adsorption steps including a citrate chelation method developed to remove >99.9% of the barium contaminants by activity from the final radium product. A procedure involving the use of three columns in succession was developed, and the separation of 223,224,225Ra from the thorium matrix was obtained with an overall recovery yield of 91 ± 3%, average radiochemical purity of 99.9%, and production yields that correspond to physical yields based on previously measured excitation functions.

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Section: Methodsmentioning

confidence: 99%

Simultaneous Separation of Actinium and Radium Isotopes from a Proton Irradiated Thorium Matrix

Mastren

Radchenko

Owens

et al. 2017

Sci Rep

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“…The separation of Th targets, Ra, Ac, and fission fragments have been executed using commercial ion-exchange and extraction chromatography resins. − However, the alpha-destructive nature of irradiated Ra and Ac can incur radiological damage on conventional organic/silica-supported resins . It is well documented that mCi quantities of these isotopes (particularly Ra and subsequent daughter products) can effectively destroy such resins to the point that in some cases the material can no longer be recovered from a column. − The estimated daily dose of 20 mCi 225 Ac (including daughter products) to 100 mg of cation-exchange resin is 2 × 10 8 cGy . The reported absorbed dose threshold of cation-exchange resins is 10 8 cGy, after which diminished performances have been observed .…”

Section: Introductionmentioning

confidence: 99%

Metal Oxide Sorbents for the Separation of Radium and Actinium

Brown

2020

Ind. Eng. Chem. Res.

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The inorganic, normal-phase sorbents alumina, titania, and zirconia were evaluated and screened for the separation of Ba, La, 228 Ra, 228 Ac, and 212 Pb in a dilute acid matrix. The results show that the sorbents are capable of fractionating the ions between pH 1 and 8. A stationary zirconia column was used to isolate Ba from La and Ra from Ac/Pb; elution profiles of each separation are presented. The utility and implications of these sorbents are discussed with respect to large-scale production of 225 Ac from radium targets.

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“…ammonium citrate, is another common way to isolate Ra 2+ . 8 A technique, often used to analyze the Ra 2+ content of water-streams, is the non-specific binding of alkaline earth cations on magnesium oxide surfaces 9 or hydrous titanium oxide. 10 The chemical properties of Ra 2+ cations can also be used to immobilize them in synthetic clay.…”

Section: Introductionmentioning

confidence: 99%