Simultaneous determination of long-lived radionuclides in environmental samples

Warwick, Peter; Vajda, N.; Molnár, Zs.; Kabai, E.; Osváth, Sz.

doi:10.1039/9781847550781-00185

Cited by 6 publications

(4 citation statements)

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“…The ash taken from each vegetation sample was measured to determine the concentrations of 234 U, 235 U, and 238 U by alpha spectrometry after radiochemical separation procedure (Vajda et al, 2003). About 0.1 ml of 232 U tracer was added to each sample, and then the samples were evaporated to almost complete dryness with mineral acids.…”

Section: Vegetationmentioning

confidence: 99%

Natural radioactivity, dose assessment and uranium uptake by agricultural crops at Khan Al-Zabeeb, Jordan

Al-Kharouf

Al-Hamarneh

Dababneh

2008

Journal of Environmental Radioactivity

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Section: Vegetationmentioning

confidence: 99%

Natural radioactivity, dose assessment and uranium uptake by agricultural crops at Khan Al-Zabeeb, Jordan

Al-Kharouf

Al-Hamarneh

Dababneh

2008

Journal of Environmental Radioactivity

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“…Supporting Information Table S1 summarizes the distribution coefficients ( K d ) of Th, Pa, and U on TEVA, TRU, UTEVA, and TK400 resins taken from refs ,– . Pa, which is predominantly pentavalent in aqueous solutions, is well-retained by TK400 resin at high concentrations of HCl (>7 M), but U(VI) and Th(IV) are poorly retained at any HCl concentration ( K d < 5).…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Separation of Protactinium-230 and Uranium-230 Isotopes from a Proton-Irradiated Thorium Matrix

Du,

Dyer,

Thakur

2024

Anal. Chem.

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The use of radioisotopes in cancer therapy is becoming increasingly important. As a potential candidate for targeted alpha therapy, 230 U (t 1/2 = 20.8 d), the decay daughter of 230 Pa (t 1/2 = 17.4 d) is currently being investigated for cancer treatment. For radioisotopes to be used in biomedicine, they must be radiochemically pure and free from carrier interference. This can be challenging given their short half-life. Thus, radiological separation methods for harvesting isotopes for use in biomedicine must be simple, fast, and capable of obtaining the required purity levels. Herein, we demonstrate a new rapid method for the separation of 230 U and 230 Pa from a proton-irradiated 232 Th metal target and from coproduced fission products with high recovery and purity. A dual-column approach was used, in which the first column was an anion exchange (AX) column and the second column was a DGA column. The MP-1 AX resin was used for the primary separation of the three major components (U, Pa, and Th, as well as fission products), and the DGA column was used for further purification of the separated 230 U. The method is simple and allows for straightforward separation of U, Pa, Th, and fission products; also, the entire process from target dissolution to shipment of 230 U could be completed in 3 days with an overall 230 U recovery yield of 96 ± 3%. Additionally, separated 230 Pa fractions can be used to harvest ingrown 230 U after initial separation.

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“…The dried elutes from the cation exchanger resin are digested and after a combined radiochemical separation [4,5] the activity concentration of 90 Sr is measured by LSC technique, the activity concentration of transuranium isotopes is determined by α spectroscopy [6]. The efficiency of the chemical digestion for 90 Sr is > 40%, for α emitters it is typically in the range of 50 -80% [4].…”

Section: Sampling Units and Sample Treatmentmentioning

confidence: 99%

Monitoring system with automatic sampling units in the surroundings Paks NPP

et al. 2006

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Continuous monitoring of the uncontrolled tritium emission from Paks Nuclear Power Plant (NPP) has been carried out since starting the NPP operation. In order to control the release of fission and corrosion products as well as 14 C automatic samplers were designed and installed into 20 observation wells in the vicinity of the reactor units. The automatic samplers contain two columns filled with anion and cation exchanger resins and are equipped with filters for trapping the chelating agents. The samplers are placed two meters below the groundwater level. Water pumps fed by accumulator ensure the water flowing through the ion-exchange columns. After a two-month working period the trapped ions are eluted from the resins. The activity of the gamma-emitters, 14 C, 90 Sr and transuranium elements are measured in the dried elute, the tritium is measured in the collected water phase. The experiences of a five-year monitoring work in the surroundings of Paks NPP are given here.

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Simultaneous determination of long-lived radionuclides in environmental samples

Cited by 6 publications

References 0 publications

Natural radioactivity, dose assessment and uranium uptake by agricultural crops at Khan Al-Zabeeb, Jordan

Natural radioactivity, dose assessment and uranium uptake by agricultural crops at Khan Al-Zabeeb, Jordan

Simultaneous Separation of Protactinium-230 and Uranium-230 Isotopes from a Proton-Irradiated Thorium Matrix

Monitoring system with automatic sampling units in the surroundings Paks NPP

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