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Uranium(VI) Sorption on Organogenic and Mineral Soil Horizons 有机土壤和矿质土壤对铀（ⅵ）的吸附
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040132
A. D. Krot, P. I. Skryleva, A. V. Rzhevskaia, I. E. Vlasova, Yu. G. Izosimova, A. L. Trigub, A. Yu. Romanchuk, I. I. Tolpeshta, S. N. Kalmykov
{"title":"Uranium(VI) Sorption on Organogenic and Mineral Soil Horizons","authors":"A. D. Krot,&nbsp;P. I. Skryleva,&nbsp;A. V. Rzhevskaia,&nbsp;I. E. Vlasova,&nbsp;Yu. G. Izosimova,&nbsp;A. L. Trigub,&nbsp;A. Yu. Romanchuk,&nbsp;I. I. Tolpeshta,&nbsp;S. N. Kalmykov","doi":"10.1134/S1066362226040132","DOIUrl":"10.1134/S1066362226040132","url":null,"abstract":"<p>The uranium(VI) sorption in organogenic and mineral horizons of peaty-podzolic-gleyic and alluvial sod-gley soils collected in Nelidovo raion, Tver oblast was studied. The fraction of adsorbed uranium and the process kinetics are determined by the soil horizon composition. In deep horizons with high content of nonsilicate iron, the uranium adsorption occurs rapidly (within less than a day) and quantitatively. In upper horizons with high organic matter content, the fraction of adsorbed uranium showed pronounced dependence on time and on the amount of dissolved organic matter in the solution. The local surrounding of uranium was analyzed by X-ray absorption spectroscopy and by sequential extraction. The uranium valence state and the main soil components responsible for uranium binding were determined by X-ray absorption spectroscopy. The uranium availability fractions were analyzed by sequential extraction. The set of data obtained using independent analysis methods significantly supplements the existing views on the uranium(VI) behavior in soils.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"558 - 569"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965421","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
Radiochemical Reprocessing of Nuclear Materials Containing Uranium Silicides: Silicon Distribution on Dissolution of Voloxidation Products of Unirradiated Triuranium Disilicide 含硅化铀核材料的放射化学后处理：未辐照的二硅化三铀氧化产物溶解中的硅分布
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040041
A. V. Boyarintsev, A. G. Koptyaeva, E. V. Boyarintseva, S. V. Artobolevskii, L. N. Podrezova, A. Yu. Shadrin, S. I. Stepanov
{"title":"Radiochemical Reprocessing of Nuclear Materials Containing Uranium Silicides: Silicon Distribution on Dissolution of Voloxidation Products of Unirradiated Triuranium Disilicide","authors":"A. V. Boyarintsev,&nbsp;A. G. Koptyaeva,&nbsp;E. V. Boyarintseva,&nbsp;S. V. Artobolevskii,&nbsp;L. N. Podrezova,&nbsp;A. Yu. Shadrin,&nbsp;S. I. Stepanov","doi":"10.1134/S1066362226040041","DOIUrl":"10.1134/S1066362226040041","url":null,"abstract":"<p>The chemical behavior of silicon in the initial steps of reprocessing of spent uranium silicide nuclear fuel (U<sub>3</sub>Si<sub>2</sub>-SNF) in nitric acid solutions was studied. The composition of voloxidation products of triuranium disilicide (U<sub>3</sub>Si<sub>2</sub>) and their solubility in nitric acid solutions were determined. The U<sub>3</sub>Si<sub>2</sub> oxidation products are U<sub>3</sub>O<sub>8</sub>, elemental silicon, and silicon dioxide (SiO<sub>2</sub>). The influence of the voloxidation and dissolution conditions on the silicon distribution into uranium-containing nitric acid solutions was studied for powders of voloxidized U<sub>3</sub>Si<sub>2</sub>.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"470 - 479"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965387","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
Evaluation of the Degree of PdO Incorporation into Borosilicate Glasses under Various Solidification Conditions 不同凝固条件下硼硅酸盐玻璃PdO掺入度的评价
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040120
A. Yu. Nikulina, E. V. Polyakov, P. V. Kozlov, K. V. Obmuch
{"title":"Evaluation of the Degree of PdO Incorporation into Borosilicate Glasses under Various Solidification Conditions","authors":"A. Yu. Nikulina,&nbsp;E. V. Polyakov,&nbsp;P. V. Kozlov,&nbsp;K. V. Obmuch","doi":"10.1134/S1066362226040120","DOIUrl":"10.1134/S1066362226040120","url":null,"abstract":"<p>Borosilicate glasses with different amounts of incorporated PdO were studied. The palladium behavior in borosilicate melts was determined. As found by the digital element mapping system, the degree of PdO incorporation into the glasses prepared does not exceed 0.10 wt % at 1150°С. Excess palladium separates in the form of the metal phase.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"550 - 557"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965420","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
Assessment of Substance Loss during Reverse-Osmosis Cyclic Preconcentration of Simulated Solution 模拟溶液反渗透循环预浓缩过程中物质损失的评估
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040089
S. M. Molchanov, D. D. Desyatov, A. A. Yekidin
{"title":"Assessment of Substance Loss during Reverse-Osmosis Cyclic Preconcentration of Simulated Solution","authors":"S. M. Molchanov,&nbsp;D. D. Desyatov,&nbsp;A. A. Yekidin","doi":"10.1134/S1066362226040089","DOIUrl":"10.1134/S1066362226040089","url":null,"abstract":"<p>Modern methods for concentrating radionuclides are reviewed with a focus on their advantages and limitations. The experimental part of the work consisted of five preconcentration cycles on a 300 L batch of simulated solution. The results show that reverse osmosis helps to reduce sample preparation time as compared to the other methods. However, it causes substance mass loss of up to 23% in a permeate stream. With increasing number of cycles, the membrane selectivity decreases owing to an increase in the solution concentration. The results were validated by evaporating the permeate, and the presence of unaccounted loss was confirmed. The paper demonstrates high potential of reverse osmosis for radionuclide analysis of water discharges from nuclear fuel cycle enterprises, as well as the need to take into account the mass loss across multiple preconcentration cycles.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"511 - 523"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965423","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
Carbonate-Alkaline Leaching of Yttrium from Sr–Y Carbonates for 90Sr–90Y Separation 碳酸盐岩碱法浸出Sr-Y碳酸盐岩中钇的90Sr-90Y分离
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040065
I. V. Smirnov, T. E. Litvinova, S. A. Gerasev, I. O. Kurochkin, V. V. Kuznetsov, K. D. Glazova, V. V. Sergeev
{"title":"Carbonate-Alkaline Leaching of Yttrium from Sr–Y Carbonates for 90Sr–90Y Separation","authors":"I. V. Smirnov,&nbsp;T. E. Litvinova,&nbsp;S. A. Gerasev,&nbsp;I. O. Kurochkin,&nbsp;V. V. Kuznetsov,&nbsp;K. D. Glazova,&nbsp;V. V. Sergeev","doi":"10.1134/S1066362226040065","DOIUrl":"10.1134/S1066362226040065","url":null,"abstract":"<p>The carbonate-alkaline leaching technique for the separation of the <sup>90</sup>Sr–<sup>90</sup>Y pair in nuclear waste processing was studied. The influence of potassium carbonate concentration, alkali metal cation, temperature, and stirring speed on the yttrium extraction was examined using stable isotopes of strontium and yttrium in the carbonate form. The highest degree of yttrium extraction (99.9 %) was achieved under the following optimum conditions: 2 M K<sub>2</sub>CO<sub>3</sub> solution, 70°C, stirring speed 500 rpm, liquid-to-solid ratio 20 mL/g, Sr : Y weight ratio 10 : 1, and leaching time 2 h. Under these conditions, the leaching process is primarily diffusion-controlled, as evidenced by the strong dependence of the extraction efficiency on the stirring speed and the apparent activation energy of 13.9 kJ mol<sup>–1</sup>.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"497 - 503"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965389","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
Modern Technetium-99m Radiopharmaceuticals 现代锝-99m放射性药物
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040016
S. V. Veselov, V. V. Kuznetsov, K. E. German, O. M. Klimenko
{"title":"Modern Technetium-99m Radiopharmaceuticals","authors":"S. V. Veselov,&nbsp;V. V. Kuznetsov,&nbsp;K. E. German,&nbsp;O. M. Klimenko","doi":"10.1134/S1066362226040016","DOIUrl":"10.1134/S1066362226040016","url":null,"abstract":"<p>The modern data on <sup>99<i>m</i></sup>Tc radiopharmaceuticals, namely, their chemical features, synthesis methods, safety, and clinical efficacy, are analyzed. Data on the procedures for preparing <sup>99<i>m</i></sup>Tc-labeled complexes, on factors influencing their stability and radiochemical yield, and on the approaches to choosing chelators are systematized. Particular attention is paid to coordination cores, to structural features of technetium complexes, and to vector fragments determining the properties of radiopharmaceuticals. The main fields of using <sup>99<i>m</i></sup>Tc radiopharmaceuticals for the diagnostics of cardiovascular, tumor, renal, and inflammatory diseases are analyzed in view of the fact that efficient diagnostics and therapy of these diseases is still an unsolved clinical problem. The safety requirements including the radiation protection, quality control, and process standardization are discussed. The problems of the development, quality control, and use of <sup>99<i>m</i></sup>Tc radiopharmaceuticals are considered. The modern trends and prospects for the development of <sup>99<i>m</i></sup>Tc radiopharmaceuticals are summarized.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"443 - 462"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965418","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
Applicability of Results of the Flash Point Determination in an Open Crucible to Determining the Safe Operation Limit for Extraction Systems Based on TBP in Alkanes 开放式坩埚闪点测定结果在确定基于烷烃TBP萃取系统安全操作极限中的适用性
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040053
N. P. Starovoitov, M. V. Logunov, I. G. Tananaev, V. A. Kazakov, V. A. Dudkin, D. A. Monstakov, P. V. Kozlov
{"title":"Applicability of Results of the Flash Point Determination in an Open Crucible to Determining the Safe Operation Limit for Extraction Systems Based on TBP in Alkanes","authors":"N. P. Starovoitov,&nbsp;M. V. Logunov,&nbsp;I. G. Tananaev,&nbsp;V. A. Kazakov,&nbsp;V. A. Dudkin,&nbsp;D. A. Monstakov,&nbsp;P. V. Kozlov","doi":"10.1134/S1066362226040053","DOIUrl":"10.1134/S1066362226040053","url":null,"abstract":"<p>The fire and explosion safety of solvent samples unirradiated and γ-irradiated to a dose of 0.5 MGy from a <sup>60</sup>Co source was evaluated by the flash point determination, simultaneous thermal analysis, and adiabatic reaction calorimetry. Samples of the fresh extraction mixture and of the used solvent taken from contactors of the RT-1 plant, containing 10 or 30% tributyl phosphate (TBP) in hydrocarbon diluents of grades С<sub>13</sub> and С<sub>10</sub>, were studied. In the course of operation of the recycled solvent prepared using the С<sub>10</sub> diluent, its flash point gradually increases by at least 10°С [1]. The experimental data suggest that the safe operation limits for extraction systems based on TBP in linear hydrocarbon diluents can be determined using the data on the open-crucible flash point.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"487 - 496"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965419","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
Electrochemical Deposition Procedure for Fabricating Linear Cobalt-57 Sources for SPECT System Calibration 制造用于SPECT系统校准的线性钴-57源的电化学沉积程序
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040090
E. S. Vasileva, V. A. Kozub, A. A. Popovich, I. V. Buryanenko, V. G. Semenov, A. B. Rogozev
{"title":"Electrochemical Deposition Procedure for Fabricating Linear Cobalt-57 Sources for SPECT System Calibration","authors":"E. S. Vasileva,&nbsp;V. A. Kozub,&nbsp;A. A. Popovich,&nbsp;I. V. Buryanenko,&nbsp;V. G. Semenov,&nbsp;A. B. Rogozev","doi":"10.1134/S1066362226040090","DOIUrl":"10.1134/S1066362226040090","url":null,"abstract":"<p>An electrochemical deposition procedure was developed for forming the active part of a linear <sup>57</sup>Co source for SPECT system calibration. The effects of copper substrate preparation, current density, stable cobalt concentration, anode material, and deposition time on the coating quality and on the activity distribution along the length were studied. Under the parameters chosen, the <sup>57</sup>Co deposition yield reaches 92–93 %; the coatings exhibit high adhesion, and the maximum nonuniformity of the activity distribution along the length does not exceed 10% with a standard deviation of ≤2.5%. Edge effects influencing the activity distribution were identified. The results confirm the feasibility of fabricating a linear <sup>57</sup>Co active part with characteristics meeting the requirements for calibration sources.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"524 - 531"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965331","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
Assessment of the Possibility of Incorporating Simulated Perlite-Containing Sludge into Sodium Aluminum Phosphate Glass 模拟含珍珠岩污泥掺入磷酸铝钠玻璃的可能性评价
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S1066362226040119
N. V. Vlasova, P. V. Kozlov, E. V. Polyakov, E. S. Zorin, E. S. Shaburova, A. A. Mal’tsev
{"title":"Assessment of the Possibility of Incorporating Simulated Perlite-Containing Sludge into Sodium Aluminum Phosphate Glass","authors":"N. V. Vlasova,&nbsp;P. V. Kozlov,&nbsp;E. V. Polyakov,&nbsp;E. S. Zorin,&nbsp;E. S. Shaburova,&nbsp;A. A. Mal’tsev","doi":"10.1134/S1066362226040119","DOIUrl":"10.1134/S1066362226040119","url":null,"abstract":"<p>The incorporation of the material simulating high-level perlite-containing sludge accumulated at the Mayak Production Association into sodium aluminum phosphate glass was studied in laboratory experiments. Crystalline phases present in the samples prepared were identified by X-ray diffraction analysis. These include graphite, silicon oxide, sodium aluminosilicate, and aluminum phosphate. The sample homogeneity was evaluated by scanning electron microscopy. The ultimate strength was determined for the most homogeneous sample. The compliance of the sample homogeneity and strength with the regulatory requirements to glassy compounds was assessed. The acceptable percentage of the perlite-containing sludge in sodium aluminum phosphate glass was determined.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"542 - 549"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965288","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
Partitioning of the High-Level Raffinate Using the Extraction System CCD–PEO–HDEHP in a Polar Diluent 用萃取系统CCD-PEO-HDEHP在极性稀释液中分配高水平萃取物
IF 0.9
Radiochemistry Pub Date : 2026-09-15 DOI: 10.1134/S106636222604003X
E. V. Ambul, A. V. Bizin, A. N. Viznyi, N. D. Goletskii, M. V. Mamchich, A. A. Naumov, P. I. Soroka, D. N. Shishkin, T. V. Kuznetsov
{"title":"Partitioning of the High-Level Raffinate Using the Extraction System CCD–PEO–HDEHP in a Polar Diluent","authors":"E. V. Ambul,&nbsp;A. V. Bizin,&nbsp;A. N. Viznyi,&nbsp;N. D. Goletskii,&nbsp;M. V. Mamchich,&nbsp;A. A. Naumov,&nbsp;P. I. Soroka,&nbsp;D. N. Shishkin,&nbsp;T. V. Kuznetsov","doi":"10.1134/S106636222604003X","DOIUrl":"10.1134/S106636222604003X","url":null,"abstract":"<p>The possibility of the deep partitioning of the raffinate from the extractive SNF reprocessing using a mixture of di-2-ethylhexyl hydrogen phosphate (HDEHP), polyethylene oxide (PEO), and chlorinated cobalt dicarbollide (CCD) in a polar diluent was demonstrated. The improved solvent containing a synergistic mixture of CCD and HDEHP efficiently extracts cesium, strontium, transplutonic elements (TPEs), and rare earth elements (REEs) from a nitric acid high-level waste (HLW) solution and allows obtaining separate fractions of the elements. Based on the results obtained, a flowsheet for the extractive HLW partitioning was developed; it has a number of advantages over the flowsheets described previously. Dynamic trials of the flowsheet with a simulated solution were performed. Efficient separation of REEs and TPEs (decontamination factor of TPEs from REEs about 200) and efficient recovery and separation of other elements being partitioned were achieved.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"68 4","pages":"480 - 486"},"PeriodicalIF":0.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965388","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
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