Radiochemistry最新文献_第8页

Nanodiamonds as Lutetium-177 Carriers for Nuclear Medicine 用作核医学镥 177 载体的纳米金刚石

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020085

A. G. Kazakov, J. S. Babenya, T. Y. Ekatova, S. E. Vinokurov, E. Y. Khvorostinin, I. A. Ushakov, V. V. Zukau, E. S. Stasyuk, E. A. Nesterov, V. L. Sadkin, A. S. Rogov, B. F. Myasoedov

引用次数: 0

Diffusion of Radioactive Waste Elements from Underground Water and Leachates of Phosphate Waste Forms in Pore Solution of Clay Materials 粘土材料孔隙溶液中地下水和磷酸盐废物浸出液中放射性废物元素的扩散

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Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020115

K. V. Martynov, E. V. Zakharova

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Aspects of Modeling of the Degradation of Engineered Safety Barriers Based on Portland Cement in Radionuclide Migration Problems 放射性核素迁移问题中基于硅酸盐水泥的工程安全屏障降解建模的各个方面

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020152

K. A. Boldyrev

{"title":"Aspects of Modeling of the Degradation of Engineered Safety Barriers Based on Portland Cement in Radionuclide Migration Problems","authors":"K. A. Boldyrev","doi":"10.1134/S1066362224020152","DOIUrl":"10.1134/S1066362224020152","url":null,"abstract":"Materials based on Portland cement and concrete are widely used for radioactive waste solidification and construction of engineered safety barriers at radioactive waste repositories. As compared to other candidate matrices, cement also exhibits the potential for chemical immobilization by reacting with many radionuclides and binding them. The water permeation through the bulk of concrete leads to its degradation, to a change in the composition of its pore water, and to transformations of solid mineral phases constituting the concrete. The long-term degradation of concrete can be estimated using geochemical modeling. A procedure for forecasting the degradation of materials based on Portland cement concrete is described. The model takes into account the stages of cement hydration and chemical degradation. The geochemical changes in the course of concrete degradation were calculated using numerical modeling with the PhreeqC code. Schemes of the stepwise concrete degradation are considered for estimating the radionuclide transport. Relevant radionuclide distribution coefficients are applied to each stage. The duration of concrete degradation stages largely depends on the filtering water composition.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 2","pages":"253 - 267"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Specific Features of Reduction of Plutonium(VI) Ozonation Products in Solutions of Various Nature Alkalis 各种性质的碱溶液中钚（VI）臭氧还原产物的具体特征

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020024

D. A. Pankratov, A. Yu. Romanchuk, S. N. Kalmykov, V. D. Dolzhenko, Yu. M. Kiselev

{"title":"Specific Features of Reduction of Plutonium(VI) Ozonation Products in Solutions of Various Nature Alkalis","authors":"D. A. Pankratov, A. Yu. Romanchuk, S. N. Kalmykov, V. D. Dolzhenko, Yu. M. Kiselev","doi":"10.1134/S1066362224020024","DOIUrl":"10.1134/S1066362224020024","url":null,"abstract":"The decomposition processes of plutonium hydroxo compounds formed under ozonation conditions in MOH (M = Li, Na, K) solutions of various concentrations were studied by UV-Vis spectroscopy using a modified nonlinear least squares method. The influence of the nature of alkali on the kinetics and mechanisms of spontaneous reduction of alkaline solutions of hydroxo compounds of plutonium(VII) was discovered. This influence and the “anomalies” in the UV-Vis spectra for ozonized plutonium solutions are associated with the presence in the systems of iron compounds in the form of impurities in commercially available LiOH, NaOH, and KOH (analytically pure, chemically pure, and ultrapure grade). Even trace amounts of impurities in alkaline solutions of plutonium compounds change the mechanisms of their reduction through the active participation of iron in redox processes. They include the oxidation of iron to ferrate(VI) ions FeO42–, followed by reduction to Fe3+, probably through the stage of formation of an intermediate with a hydroxo derivative of plutonium(VI). As a result of the analysis of large arrays of spectral data, the spectra of individual components corresponding to compounds of plutonium(VI, VII) and iron (VI) were isolated.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 2","pages":"134 - 144"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of High-temperature VVER-1000 SNF Reprocessing Time on the Extent of Fission Product Removal 高温 VVER-1000 SNF 后处理时间对裂变产物去除程度的影响

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020048

I. N. Skrigan, M. M. Metalidi, R. V. Ismailov, S. V. Shapovalov, A. Yu. Shadrin, D. V. Ryabkov, R. A. Serebryanskikh

引用次数: 0

Lithium, Sodium, and Strontium Fluoroglutaratouranylates: Structure and Some Properties 锂、钠和锶氟谷氨酸锶盐：结构和某些性质

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020012

V. N. Serezhkin, М. S. Grigoriev, М. V. Sukacheva, D. V. Pushkin, L. B. Serezhkina

{"title":"Lithium, Sodium, and Strontium Fluoroglutaratouranylates: Structure and Some Properties","authors":"V. N. Serezhkin, М. S. Grigoriev, М. V. Sukacheva, D. V. Pushkin, L. B. Serezhkina","doi":"10.1134/S1066362224020012","DOIUrl":"10.1134/S1066362224020012","url":null,"abstract":"The structure of the crystals of Li(UO2)2(C5H6O4)2F‧6H2O (I), NaUO2(C5H6O4)F‧4H2O (II), and Sr(UO2)2(C5H6O4)2F2‧8H2O (III) was studied by X-ray diffraction analysis for the first time. The uranium-containing structural units in crystals of I are 1D complexes [UO2(C5H6O4)F0.5(H2O)]0.5– with the crystal chemical formula AQ02M20.5M1, where A = UO22+, Q02 = C5H6O42–, M2 = F–, M1 = H2O, and in II and III, 1D complexes of the same composition and structure [UO2(C5H6O4)F]– with the crystal chemical formula AQ02M2. In all compounds, the U(VI) atoms implement hexagonal-bipyramidal coordination, forming coordination polyhedra UO2FO5 (I) and UO2F2O4 (II and III). It was found that the uranyl fluoroglutarate {UJUBEG}, for which the composition [UO2(С5H6O4)F]‧2H2O contradicting the of electroneutrality principle was previously erroneously indicated, should be considered as (Н3O)[UO2(С5H6O4)F]‧H2O.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 2","pages":"125 - 133"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retrospective Estimation of Potential Mobility of Artificial Radionuclides (60Co, 137Сs, 152Eu, 154Eu) in Bottom Sediments of the Yenisei River 叶尼塞河底沉积物中人工放射性核素（60钴、137Сs、152Eu、154Eu）潜在迁移率的回顾性估计

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020127

T. A. Zotina, Yu. V. Alexandrova, A. V. Chuguevsky, M. S. Melgunov

{"title":"Retrospective Estimation of Potential Mobility of Artificial Radionuclides (60Co, 137Сs, 152Eu, 154Eu) in Bottom Sediments of the Yenisei River","authors":"T. A. Zotina, Yu. V. Alexandrova, A. V. Chuguevsky, M. S. Melgunov","doi":"10.1134/S1066362224020127","DOIUrl":"10.1134/S1066362224020127","url":null,"abstract":"The present study addresses transformation of physicochemical forms (species) of artificial radionuclides in bottom sediments (BS) of the Yenisei River after the shutdown of the reactors at the Mining-and-Chemical Combine (MCC) at Krasnoyarsk. The BS samples collected from the Yenisei at the MCC in 2018–2021 contained 60Co, 137Cs, 152Eu, 154Eu, 155Eu, and 241Am. The species of radionuclides were studied using sequential extraction procedure. Considerable proportions of 60Co (48–100%) and 137Cs (72–83%), which are still released to the Yenisei with controlled discharges, were irreversibly bound to BS mineral solids. The percentages of europium isotopes, which have not been released to the Yenisei as part of controlled discharges since 2013, were lower in the irreversibly bound fraction (4.6–9.3% of 152Eu), but their representation as relatively mobile species was more diverse compared to 60Co and 137Cs. Interestingly, some percentage of 152Eu (up to 15.5%) was retained in the most mobile, exchangeable, form. The species of 154Eu and 152Eu differed, which can be explained by dissimilar origins of these isotopes. Further research is needed to investigate the mechanisms of physicochemical transformation of radionuclides in BS that enable them to be present in mobile species over long time periods and mechanisms of immobilization of artificial radionuclides in the environment.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 2","pages":"227 - 234"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

XPS Determination of the Oxidation State of 99Тс Isotope Absorbed on the Surface of Pyrrhotite FenSn+1 and Stibnite Sb2S3 黄铁矿 FenSn+1 和黝帘石 Sb2S3 表面吸收的 99Тс 同位素的氧化态的 XPS 测定

IF 0.9

Radiochemistry Pub Date : 2024-05-16 DOI: 10.1134/S1066362224020036

K. I. Maslakov, A. Yu. Teterin, A. V. Safonov, A. V. Makarov, G. D. Artemiev, Yu. A. Teterin, S. V. Dvoriak

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Release of 137Cs into the Gas Phase during the Interaction of 137Cs Compounds with Molten Lead 137Cs 化合物与熔融铅相互作用过程中 137Cs 释放到气相中的情况

IF 0.9

Radiochemistry Pub Date : 2024-04-23 DOI: 10.1134/S1066362224010090

V. V. Kulemin, I. A. Rumer, Yu. M. Nevolin, E. P. Krasavina, S. A. Kulyukhin

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Influence of Gamma Radiation on the Composition and Physicochemical Characteristics of Olefins: Post-Radiation Effects 伽马辐射对烯烃成分和理化特性的影响：辐射后效应