Improvements to arapid method for separating strontium from liquid milk by treatment with a chelating resin and crown ethers

Tait, D.; Wiechen, A.

doi:10.1007/bf02040717

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…Tait and Wiechen [42] treated the milk in a batch procedure with a Chelite P resin 5 (aminomethylphosphonate group) in Na + form. The contact time is between 30 and 40 min at 65-70°C in a water bath.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Tait and Wiechen [42] have used the crown ether DC18C6 into chloroform followed by extraction of barium into dichloromethane containing 21 crown 7 (21C7). The limitation of the procedure is the generation of organic solvent wastes.…”

Section: Liquid -Liquid Extractionmentioning

confidence: 99%

“…Although the lower background obtained with ultra low level liquid scintillation (> 3 dpm) is greater than for the proportional counter, liquid scintillation is frequently used [2,5,18,19,23,28,36,[42][43][44][45] because it gives a b spectral distribution for the three radionuclides. Furthermore, liquid scintillation is characterized by a high counting efficiency (> 85% for 90 Sr and 90 Y) and avoids counting problems such as self absorption, poor geometry or nonuniformity of sample mounting.…”

Section: Liquid Scintillation Detectormentioning

confidence: 99%

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Methodology for determination of radiostrontium in milk: a review

Brun

Kergadallan

Boursier

et al. 2003

Lait

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-This paper presents a review on all available analytical methods for 90 Sr and 89 Sr determination in milk. Special attention was focused on the parameter of the performing time in order to assess the rapid measurement of milk contamination, especially in the case of emergency situations such as a nuclear plant accident. Preliminarily, a short description of the milk matrix and radiostrontium transfer from soil to milk and its derivatives is given. Then analytical procedures are examined step by step. 90 Sr and 89 Sr can be separately determined in less than 2 days by a rapid sample pretreatment and the use of a liquid scintillation detector.Strontium / radioactivity / analytical method / milk Résumé -Revue des méthodes de dosage du radiostrontium dans le lait. Cet article présente l'ensemble des méthodes analytiques disponibles pour le dosage du 90 Sr et du 89 Sr dans le lait. Cette étude attache une importance toute particulière à la durée d'analyse dans le but d'une estimation rapide de la contamination du lait telle qu'elle est rendue nécessaire dans le cas de situations d'urgences comme l'accident d'une centrale nucléaire. En préliminaires, une rapide description de la matrice lait et du transfert du radiostrontium du sol au lait et ses dérivés est donnée. Puis, les procédures analytiques sont examinées étape par étape. Les isotopes 90 et 89 du strontium peuvent être déterminés séparément en moins de 2 jours par un traitement rapide de l'échantillon et l'utilisation d'un détecteur à scintillation liquide. Strontium / radioactivité / méthode d'analyse / lait

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Section: Sample Preparationmentioning

confidence: 99%

Section: Liquid -Liquid Extractionmentioning

confidence: 99%

Section: Liquid Scintillation Detectormentioning

confidence: 99%

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Methodology for determination of radiostrontium in milk: a review

Brun

Kergadallan

Boursier

et al. 2003

Lait

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“…Παράλληλα με την ανάπτυξη των μη πυριτικών κατιοντοανταλλακτών, αναπτύχθηκε και η μελέτη των ζεόλιθων από τον πρωτοπόρο Barrer και τους συνεργάτες του (Barrer, 1978 Fe, Narbutt et al, 1994;Milyutin et al, 1995 KCoNi,;η=φορτίο ένυδρα οξείδια οξείδια πυριτίου, Tamura et al, 1963;Bonner et al, 1966;αλουμινίου, 0.2-5 Singh et al, 1977;McCulloch et al, 1984ζιρκονίου, αντιμονίου, Zouad et al, 1994 poluantimonic acid κ.λ.π Bhattacharyya et al, 1995;Aly et al, 1995 Bortun et aU 1993Zanin et al, 1994Reddy et aU 1994;Lobo et al, 1995Vanura et al, 1995Rifi et aU 1995Mishra et al, 1992Lazic et al, 1991 Οργανικές Ενώσεις Schubert, 1955;Walker et al, 1969;Luetzelschwab et al, 1975;Guus et al, 1991;Tait et al, 1992;Grahek et al, 1995, Shaw, 1996Llobet et al, 1993Vajda et al, 1992Shehata, 1994;Hill et al, 1994;Kenner et al, 1995Skoryna et al, 1964Silva et al, 1970;Garnham et al, 1993, Avery, 1995 CEC (Cation Exchange Capacity) είναι η κατιοντοανταλλακτική ικανότητα του υλικού δηλ. η ποσότητα (mmol) μονοσθενών στοιχείων που περιέχονται σε lg υλικού (Κεφάλαιο 3).…”

Section: ραδβενεργος ρυπανσηunclassified

Μελετη Της Δεσμευσης Ραδιενεργων Ρυπων Απο Υποστυλωμενα Φυλλομορφα Αργιλοπυριτικα Υλικα

Καραμανησ¹

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The aim of the research presented in this thesis was the study of the selective sorption of radioactive cesium and strontium in Pillared Layered Clays (PILCs). Two reference samples, coded ATFflNA and AZA, were initially used in experiments both in vitro and in vivo. An improved pillared clay, coded FRAZA, was constructed, characterised by several methods (XRD, XRF, PIGE, N 2 adsorption-desorption, radiotracers' exchange isotherms) and employed in exchange experiments. The reference samples and the material FRAZA differed in both the nm and μηι scales as a result of the different organisation and structural evolution of the clay layers. Furthermore, four different methods, defined as method A, Β etc, were tested for restoring the cation exchange capacity (CEC) of the thus prepared PILCs. The most effective proved method D which involved exposing the material to ammonia fumes followed by soaking in a sodium alkaline solution.Samples of ATHINA-A and AZA-A were used in the in vitro sorption experiments under static conditions. Kinetic experiments were analysed through the laws of isotopie exchange and film diffusion as the rate-determining step. Sorption rates of the order of hours were observed. The application of a phenomenological model developed for the interpretation of the results obtained in these experiments (NPL model), determined the selectivity coefficients of Cs or Sr over competitive cations of Na, Κ, Η and Ca. The observed PILCs' selectivity was interpreted through the electrostatic interaction of the cations and the negative charged clay layers. Furthermore, the influence of pH, solution volume and temperature in radiostrontium sorption was studied while, in experiments with cation concentrations simulating rumen liquid, the NPL model predicted the observed strontium sorption percentages. Comparison of PILCs with cyanoferrates (AFCF) revealed the reasons of AFCF effectiveness in cesium sorption and PILC superiority in strontium sorption. An unsuccessful in vivo experiment involving PILC administration to ruminants was attributed mainly to the limited time of contact between the material and strontium in the digestive tract of the animals and the insufficient material CEC restoration (method A).The materials AZA-D and FRAZA-D were used in cation exchange experiments. Cesium or strontium uptake was faster in FRAZA-D than AZA-D under both static and dynamic experimental conditions. This result was attributed to the different microscopic and macroscopic structure that materials possessed. Moreover, the separation factors Sr-Na and Sr-Ca were determined for FRAZA-D with values greater than 40 and 2 respectively. The selectivity of FRAZA-D for strontium sorption over several monovalent and divalent competitive cations was further confirmed in experiments with rumen liquid. The results derived from FRAZA-D administration in ruminants for strontium and cesium sorption were positive and promising for further investigation and research.

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Environmental radiochemistry and radioactivity a current bibliography

Bujdosó

1995

Journal of Radioanalytical and Nuclear Chemistry Articles

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Improvements to arapid method for separating strontium from liquid milk by treatment with a chelating resin and crown ethers

Cited by 9 publications

References 2 publications

Methodology for determination of radiostrontium in milk: a review

Methodology for determination of radiostrontium in milk: a review

Μελετη Της Δεσμευσης Ραδιενεργων Ρυπων Απο Υποστυλωμενα Φυλλομορφα Αργιλοπυριτικα Υλικα

Environmental radiochemistry and radioactivity a current bibliography

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