Determination of strontium-90 from direct separation of yttrium-90 by solid phase extraction using DGA Resin for seawater monitoring

Tazoe, Hirofumi; Obata, Hajime; Yamagata, Toshio; Karube, Zin’ichi; Nagai, Hiroki; Yamada, Masatoshi

doi:10.1016/j.talanta.2016.01.065

Cited by 48 publications

(7 citation statements)

References 42 publications

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“…(IL, USA). Detailed chemical separation and beta counting procedures are described elsewhere [22,23]. Beta particles were counted by a low background 2π gas flow proportional counter (LB−4200, Canberra, NV, USA) during 120 min intervals for more than 20 h. Typical Sr and Y yields were 82 ± 9 % and 95 ± 5 %, respectively.…”

Section: Methodsmentioning

confidence: 99%

Observation of Dispersion in the Japanese Coastal Area of Released 90Sr, 134Cs, and 137Cs from the Fukushima Daiichi Nuclear Power Plant to the Sea in 2013

Tazoe

Yamagata

Tsujita

et al. 2019

IJERPH

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The March 2011 earthquake and tsunami resulted in significant damage to the Fukushima Daiichi Nuclear Power Plant (FDNPP) and the subsequent release of radionuclides into the ocean. Here, we investigated the spatial distribution of strontium-90 (90Sr) and cesium-134/cesium-137 (134, 137Cs) in surface seawater of the coastal region near the FDNPP. In the coastal region, 90Sr activity was high, from 0.89 to 29.13 mBq L−1, with detectable FDNPP site-derived 134Cs. This indicated that release of 90Sr from the power plant was ongoing even in May 2013, as was that of 134Cs and 137Cs. 90Sr activities measured at open ocean sites corresponded to background derived from atmospheric nuclear weapons testing fallout. The FDNPP site-derived 90Sr/137Cs activity ratios in seawater were much higher than those in the direct discharge event in March 2011, in river input, and in seabed sediment; those ratios showed large variability, ranging from 0.16 to 0.64 despite a short sampling period. This FDNPP site-derived 90Sr/137Cs activity ratio suggests that these radionuclides were mainly derived from stagnant water in the reactor and turbine buildings of the FDNPP, while a different source with a low 90Sr/137Cs ratio could contribute to and produce the temporal variability of the 90Sr/137Cs ratio in coastal water. We estimated the release rate of 90Sr from the power plant as 9.6 ± 6.1 GBq day−1 in May 2013 on the basis of the relationship between 90Sr and 137Cs activity (90Sr/137Cs = 0.66 ± 0.05) and 137Cs release rate.

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Section: Methodsmentioning

confidence: 99%

Observation of Dispersion in the Japanese Coastal Area of Released 90Sr, 134Cs, and 137Cs from the Fukushima Daiichi Nuclear Power Plant to the Sea in 2013

Tazoe

Yamagata

Tsujita

et al. 2019

IJERPH

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“…The precipitate was filtered with a GF/F filter and dissolved in 5 mL of 8 M HNO 3 . The 90 Y separation method using DGA Resin, beta counting, and data processing are described in Tazoe et al (2016). After beta counting, the sample was dissolved in HNO 3 and diluted for the determination of the Y yield using ICP-OES.…”

Section: Seawater Samplementioning

confidence: 99%

“…Here, we aimed to establish a method to determine 90 Sr concentrations as low as 0.2 Bq m -3 , which is one order of magnitude lower than the average background level in the Pacific surface water. eny radionuclide, 90 Y, from a seawater sample (Maxwell et al, 2013;Tazoe et al, 2016). Adopting highly efficient DGA Resin separation as a purification process can achieve to simplify preconcentration step, which improves analytical throughput and reliability.…”

Section: Introductionmentioning

confidence: 99%

Novel method for low level Sr-90 activity detection in seawater by combining oxalate precipitation and chelating resin extraction

Tazoe

Obata

Tomita³

et al. 2017

Geochem. J.

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90 Sr released into seawater from nuclear bomb testing and nuclear facility accident sites requires long-term monitoring. However, measuring 90 Sr in seawater is still difficult and time-consuming. This study is aimed at improving the preconcentration method for successive purification using DGA Resin chromatography, which is applied to 90 Sr analysis in seawater. At natural pH, the oxalate coprecipitation technique effectively collected Sr (84% in Sr yield) from seawater without Mg or Na. For 90 Sr determination, 90 Y in secular equilibrium with 90 Sr was directly extracted using Fe coprecipitation and DGA Resin chromatography. The proposed method simplifies the analytical processes associated with the conventional method. Analytical results for surface seawater in the western North Pacific (0.81 ± 0.06 Bq m-3 , n = 5) were consistent with those obtained using the conventional method (0.81 ± 0.07 Bq m-3 , n = 5).

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“…Yttrium-90 (T1/2 = 64 h, Eβmax = 2.28 MeV) is betaemitting radionuclide, it exists in equilibrium with his maternal radionuclide 90 Sr (T1/2 = 28.8 yrs) [1]- [3]. Yttrium-90 is of great interest to monitor strontium-90 in natural samples.…”

Section: Introductionmentioning

confidence: 99%

Yttrium-90 Separation in Carbonate Media by Solvent Extraction

Смірнов¹,

Harb²,

Balantsev³

et al. 2021

RAD Conference Proceedings

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The possibilities of 90 Y/ 90 Sr separation from carbonate media are investigated as a green alternative method. Solvent extraction of yttrium and strontium from carbonate solution is studied using several extractants in different organic diluents. 8-hydroxyquinioline and 2,3-dihydroxynaphtalene possess a promising Y/Sr separation. Yttrium and strontium distribution ratios D and separation factors SF are evaluated. pH interval 13 -13.5 is regarded as the optimum for separation. Yttrium is extracted much better in 2-nitrotoluene (DY=3.9), maximum separation is observed in 2-nitrotoluene SF = 195 at pH 13.5.

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Determination of strontium-90 from direct separation of yttrium-90 by solid phase extraction using DGA Resin for seawater monitoring

Cited by 48 publications

References 42 publications

Observation of Dispersion in the Japanese Coastal Area of Released 90Sr, 134Cs, and 137Cs from the Fukushima Daiichi Nuclear Power Plant to the Sea in 2013

Observation of Dispersion in the Japanese Coastal Area of Released 90Sr, 134Cs, and 137Cs from the Fukushima Daiichi Nuclear Power Plant to the Sea in 2013

Novel method for low level Sr-90 activity detection in seawater by combining oxalate precipitation and chelating resin extraction

Yttrium-90 Separation in Carbonate Media by Solvent Extraction

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