Distribution of 137Cs in the Surface Layer of the Black Sea in Summer, 2017

Dovhyi, I. I.; Kremenchutskii, D. A.; Bezhin, N. A.; Kozlovskaia, O. N.; Milyutin, V. V.; Kozlitin, E. A.

doi:10.22449/1573-160x-2020-2-152-160

Cited by 10 publications

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“…This paper continues the work performed in a series of articles [18,[22][23][24] devoted to the recovery of cesium, including 137 Cs, from seawater by various types of sorbents based on transition metal ferrocyanides (Anfezh, Niket, Uniket, FSS, FD-M, Termoxid 35, NKF-C, FIC), resorcinol-formaldehyde polymer (Axionit RCs), and zirconium phosphate (Termoxid 3A).…”

Section: Introductionsupporting

confidence: 53%

“…The fiber impregnated with hexacyanoferrate has a developed specific surface, which increases the speed and efficiency of the extraction of radionuclides from seawater; therefore, this type of material can be considered the most promising. At the same time, the high sorption efficiency of 137 Cs from seawater is shown by sorbents based on cellulose support and silica gel, for example, a Russian-made sorbent of the FSS [18].…”

Section: Introductionmentioning

confidence: 98%

“…A systematic assessment of the distribution of 137 Cs is necessary to identify fresh sources of this radionuclide. In the absence of a fresh source, the distribution of 137 Cs in the surface layer is homogeneous [18] because this radionuclide is practically not adsorbed onto suspended matter. Therefore, when assessing the distribution of 137 Cs, it is necessary to indicate the time parameters and number of research cruises.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of 137Cs Distribution and Recovery Using Various Types of Sorbents in the Black Sea Surface Layer

et al. 2023

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Monitoring 137Cs in seawater is necessary for the timely detection of radioactive contamination. The possibility of sorption and the sorption efficiency of 137Cs from seawater were studied for the first time during several cruises of the R/V (research vessel) Professor Vodyanitsky using various types of sorbents based on transition metal ferrocyanides (Anfezh, Niket, Uniket, FSS, FD-M, FIC, Termoxid 35, NKF-C) and zirconium phosphate (Termoxid 3A). The influence of the seawater flow rate and volume of the sorbent used for the recovery of 137Cs was estimated. The ferrocyanide sorbents Niket, Uniket, Termoxid 35, and FIC showed the best sorption efficiency (60–100%) at a seawater flow rate of 2–4 column volumes per minute. The data obtained during three cruises on the R/V Professor Vodyanitsky were analyzed. A detailed (28 sampling points) spatial distribution of 137Cs in the Black Sea along the southern coast of Crimea was studied using the sorbents that showed the best characteristics. An increase in 137Cs activity in the study area was not found, and the average activity was 9.01 ± 0.87 Bq/m3.

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Section: Introductionsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Estimation of 137Cs Distribution and Recovery Using Various Types of Sorbents in the Black Sea Surface Layer

et al. 2023

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“…In addition to obtaining Au isotopes, it is also necessary to develop a method for their recovery from irradiated targets. Sorption materials, widely used to solve the problems of radioanalytical chemistry [ 13 , 14 ], radiochemical technologies [ 15 , 16 ], and nuclear medicine [ 17 ], were studied in several works for the separation of Au and Hg. It was established that the K d of both elements in different media on cation- and anion-exchange sorbents was either very low or very high, which did not enable quantitatively separating them from each other [ 18 , 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Photonuclear Alchemy: Obtaining Medical Isotopes of Gold from Mercury Irradiated on Electron Accelerators

et al. 2022

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In our work, the photonuclear production of 198,199Au isotopes for nuclear medicine purposes was studied, and a method for their recovery from irradiated mercury was developed. The yields of the corresponding nuclear reactions were determined, and a comparison of various methods of obtaining gold radioisotopes was provided. New sorbents based on benzo-15-crown-5, which selectively binds gold, were studied, and the optimal conditions for Au recovery with a high degree of purification from mercury were found. It was established that, for the fast and quantitative recovery of Au isotopes, it was necessary to add at least 0.1 mg of the carrier. As a result, the developed method can be regularly used to obtain 198,199Au for the research of radiopharmaceuticals based on them.

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“…Its input into the Black Sea is due to atmospheric fallout and river runoff [6]. A number of works [6][7][8][9][10][11][12][13] are devoted to the study of the spatiotemporal variability of its content in the Black Sea region water and bottom sediments. This radionuclide is widely used to obtain the sedimentation rate quantitative estimates [12,[14][15].…”

Section: Introductionmentioning

confidence: 99%

Distribution of 137Cs and 40K in the Bottom Sediments of the Balaklava Bay (the Black Sea)

Kremenchutskii¹,

Gurov²

2021

PhO

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Purpose. The aim of the work is to study spatial variability of the 137Cs and 40K concentrations in the bottom sediments of the Balaklava Bay, and to estimate the sedimentation rate and relative content of the biogenic fraction. Methods and Results. The results of the 137Cs and 40K concentration measurements in 5 columns of the bottom sediments sampled in various parts of the Balaklava Bay are represented. Activity of 137Cs and 40K in the samples was determined by the gamma spectrometric analysis. Based on the measurement data, spatial variability of the 137Cs and 40K concentration fields in the bottom sediments was studied, and the sedimentation rate was quantitatively estimated. Application of the balance equation provided quantitative estimates of the relative biogenic fraction content; its spatial variability was described. Quantitative estimates of the relationship between the biogenic fraction estimates resulted from use of the direct and indirect methods are represented. Conclusions. According to the obtained results, the 137Cs and 40K concentrations in the upper 5 cm layer of bottom sediments varied in space from 11 to 62 and from 155 to 562 Bq/kg, respectively. The maximum radionuclide concentrations were characteristic of the northern part of the bay, the minimum ones – of its southern part. The sedimentation average rate was 0.51 ± 0.06 cm/year. Relative biogenic fraction content in the sediments varied in space from 30 to 89% and averaged 46 ± 25%. The maximum values were observed in the southern part of the bay, the minimum ones – in the northern part.

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Distribution of 137Cs in the Surface Layer of the Black Sea in Summer, 2017

Cited by 10 publications

References 0 publications

Estimation of 137Cs Distribution and Recovery Using Various Types of Sorbents in the Black Sea Surface Layer

Estimation of 137Cs Distribution and Recovery Using Various Types of Sorbents in the Black Sea Surface Layer

Photonuclear Alchemy: Obtaining Medical Isotopes of Gold from Mercury Irradiated on Electron Accelerators

Distribution of 137Cs and 40K in the Bottom Sediments of the Balaklava Bay (the Black Sea)

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